What gasoline to fill in a lawn mower

Gasoline for chainsaw

For domestic chainsaws (Ural, Druzhba, etc.), AI-80 gasoline is used. Oils can be used domestically, such as M8-B (or early marking AS-8, -10), M-12 TP, M-12TPU, MGD-14M. It is also possible to use oils from foreign manufacturers. In any case, the proportions when mixing oil and gasoline should be 1/25, that is, one hundred grams per two and a half liters of gasoline.
For modern chainsaws from foreign manufacturers, the proportions are usually equal to 1/40 (100 grams per 4 liters of AI-92), 1/50 (100 grams per 5 liters of AI-92). Use AI-92 gasoline. You can often see that the AI-95 brand will be indicated in the instructions. but with our quality of this gasoline, the octane number of which is catching up with additives, I would not recommend using the 95th if you are not sure of its quality.

More about mixing proportions:

To measure the required amount of oil, you can use a syringe, a measuring bottle, a special dispenser or, for example, a bottle with a dispenser from Stihl.
Oils from different manufacturers in different colors. As you can see in the picture above, HP calm oil (mineral water) is red, more expensive synthetic ones are green. Husqvarna oil can be green or blue.

REMEMBER! IN THE CASE OF A CHAINSAW OUT OF THE SYSTEM FOR THE CAUSE OF FILLING WITH AN INCORRECT MIXTURE, THE REPAIR WILL BE NON-WARRANTY!

[important] Tips:
It is better to overfill than underfill! If it is written 1/50, then when you pour 25 grams per liter, terrible will not happen, since coking in this case is unlikely. But if you add 15 grams per liter, it is quite possible that this will not be enough..
Do not store the ready-made fuel mixture for more than a month (preferably less), as it loses its octane number (gasoline “runs out”).
Run out the entire tank or drain before the season to avoid loss of quality of gasoline and wear of rubber and plastic seals.
Never use oils for mopeds – they are designed for lower rpm [/ important]

Gasoline for chainsaw: what to pour?

Since a two-stroke engine is used on chainsaws, where it is structurally impossible to install an oil pump, you cannot pour pure gasoline into a chainsaw! The chainsaws are filled with a fuel mixture of gasoline and oil. The proportions for different saws are set by the manufacturer, the specific number is indicated in the operating instructions.

The question is often asked: gasoline for a chainsaw – what to pour? I will try to answer in more detail ….

Alternative fuel option

For refueling household and professional chainsaws, it is recommended to use non-alcoholic components and additional additives – motor gasoline of the AI-92 type.

The question of whether it is possible to pour 95 gasoline into a chainsaw is still controversial. Theoretically, the anti-knock properties of AI-95 gasoline are higher than that of standard AI-92 fuel, but in practice it is better to give preference to the second option..

The problem is that in order to increase the anti-knock characteristics, manufacturers and distributors introduce additives into the 95th gasoline, the quality and effectiveness of which raises reasonable doubts among specialists..

Such fuel does not fully meet the required characteristics, does not have the proper stability during long-term storage. After 3-4 months of exposure, its working properties deteriorate by 25-30%.

What gasoline to fill in the chainsaw and other details of refueling

High-quality refueling of the chainsaw with fuels and lubricants determines its traction characteristics and durability of operation. Information about which gasoline to pour into the chainsaw is available in the attached instructions, but there is practically no information about the nuances of choosing consumables in the description.

The design feature of the power units of chainsaw equipment is, first of all:

• the ability to work for a long time at high-speed operating modes;
• compact dimensions;
• small displacement and high compression ratio.

The above characteristics impose special requirements on the selection and quality of fuels and lubricants..

The operational characteristics of the saw, in particular, the consumption of gasoline per hour, engine thrust and low-cost development of the overhaul life of the tool are largely determined by the competent adjustment of the carburetor and the correct selection of the components of the fuel mixture.

Features of the preparation of the mixture

For safety reasons, it is recommended to prepare the fuel mixture in a metal canister that is not subject to the formation of static electricity..

• The recommended proportions of gasoline and oil for each model are individual. In most cases, this is a ratio of 50: 1 and 40: 1. Chainsaws running on a gasoline-oil mixture in a ratio of 25: 1 are much less common..
• According to the manufacturers of branded chainsaw equipment, their products do not need running-in. Nevertheless, during the first hours of operation, experts advise to operate a new chainsaw on a fuel mixture with an increased m of oil and, if possible, in a gentle mode..

For preparation of the working mixture, containers with built-in dispensers are convenient. The selectivity of fuel filters at gas stations, in some cases, leaves much to be desired, therefore, it is recommended to filter gasoline through suede or non-fiber material.

The implementation of these recommendations will save you from spontaneous equipment failures associated with a malfunction of the carburetor..

The specific characteristics of mineral or organic chain oil are focused on the lubrication and cooling of the saw set, therefore not suitable for preparing a fuel mixture.

Risks of using fuel and oil surrogates

The design features of the internal combustion engine for chainsaws of domestic and imported assortment exclude the use of biofuel and gas condensate gasoline substitutes, which are more affordable at a cost. The performance characteristics of such a fuel are currently far from perfect..

In the total sales of motor oils, counterfeit lubricants, according to various sources, range from 8 to 15%. Only an experienced specialist can distinguish an original product from a fake..

To eliminate possible risks of early breakdown of the saw, it is recommended to purchase consumables at branded outlets and representative offices of dealer companies.

With all the external similarity, it is forbidden to use oils for two-stroke internal combustion engines of mopeds and light motorcycles for preparing a working fuel mixture. The use of non-recommended lubricants may initiate a denial of warranty by the service department..

Gasoline recommendations

By current standards, the best gasoline for a chainsaw should be unleaded, high octane, and reasonably fresh. High degree of purification from impurities is welcomed.

• Refueling the fuel system with fuel more than half a year old storage, negatively affects the traction characteristics of the internal combustion engine, contributes to carbon formation and the occurrence of detonation phenomena.
• For beginners and experienced users, it is advisable to exclude from the scope of their attention low-octane gasoline for chainsaws, as well as cheap motor oils of unknown origin. The use of leaded fuel is not prohibited, but in order to extend the life of the saw, it is best to refuse its use at the selection stage.

Practice shows that saving on the quality and cost of consumables negatively affects the performance of chainsaw equipment and the duration of its full operation..

Engine oil selection criteria

For self-preparation of the combustible mixture, in a metered amount, a heat-resistant branded engine oil recommended by the manufacturer is used.

• The specificity of this lubricant is its use in high-speed air-cooled internal combustion engines, which are used in household and professional-grade chainsaws..
• Depending on the season, engine oil of different densities is used to prepare the combustible mixture, which retains its working properties in the temperature range indicated on the label..
• For use, branded oils are recommended that provide full lubrication of the piston group and the connecting rod-crank mechanism in all operating modes of the power unit.
• Branded products differ in color. In particular, Shtilev mineral oils are red, synthetic ones are colored green. Husqvarna branded engine oils – blue or green.

Even taking into account the lower cost of mineral oils, it is recommended to use the advantages of synthetic analogues to prepare a high-quality fuel mixture..

Recommended sequence

In accordance with the standard technology for preparing the fuel mixture, the estimated amount of oil is poured into a tank that is half full.

The mixture is thoroughly mixed with the plug closed, after which the rest of the gasoline is poured. This sequence contributes to the homogeneity of the resulting composition..

It is advisable to prepare fuel for a chainsaw in an amount sufficient to perform a one-time job. The finished composition at a standard temperature of 20 ° C can be stored for no more than one month. At higher temperatures the shelf life is reduced to 2 weeks..

The expired mixture initiates the formation of resinous compounds that contribute to the clogging of the nozzles, the formation of carbon deposits and restricting the mobility of the piston rings. In order to save money, the overexposed composition can be consumed by adding up to 15-20% of the total volume to the fresh mixture..

What gasoline to pour into the lawn mower?

What kind of gasoline should I put into my lawn mower? This question often arises from the new owners of this equipment. As a rule, this information is presented in the technical documentation of the device, but it is worth knowing about the possible options.

What gasoline to pour into the mower depends on the type of engine. It can be two- or four-stroke. Consider the features of both motors.

The process of preparing fuel is quite simple: as a rule, for mineral oils, the ratio to gasoline is 1:32. 1:35, for synthetic. 1:50 as indicated on the package.

To keep your petrol lawnmower with fuel for the entire season, you only need to hover it once. To do this, take, for example, a five-liter canister and add 100 ml of oil to it. If this amount is not enough for you, repeat the procedure again.

What gasoline to fill in a lawnmower with a four-stroke engine?

Now let’s tell you what kind of gasoline to pour into a lawn mower with a four-stroke engine, the main difference of which is the presence of a crankcase. It contains oil for lubricating the engine, therefore, for this type of apparatus to function normally, it is enough to fill it with gasoline only. However, there are some peculiarities here. Since the equipment does not have an oil filter, which means that it cannot be cleaned, it must be changed approximately every 50 hours of operation..

As for the gasoline that you need to refuel the mower, it should not be of a higher grade than that recommended by the manufacturer of the equipment. Since the higher the octane number, the longer the fuel burns. This, in turn, can lead to significant problems and premature tool failure..

It is well known that gasoline is a very flammable substance, and its vapors are explosive. Based on this, we recommend that you always follow a few simple rules that will ensure the safety of each user:

• Allow the engine to cool before refueling..
• Fill in only 92nd gasoline (not lower);
• Do not work with fuel if there is an open fire nearby, and smoking is also prohibited..
• To avoid exhaust gas poisoning, refuel and start up outdoors or in a well-ventilated area..
• It is not recommended to fill the tank completely, it is imperative to leave room for the “expansion” of gasoline, which always occurs when it heats up.
• Try to keep fuel away from your clothes and shoes.

In general, the maintenance of the gasoline engines of the lawn mower. a fairly simple matter that does not require any special knowledge and skills from you. For units with a two-stroke engine, you need to learn how to properly prepare the combustible mixture, as well as clean the air filter in a timely manner. For machines with a four-stroke engine, it is enough to change the oil annually and clean the air filter so that it will serve you faithfully for many years..

It is profitable and convenient to cooperate with us, because we:

If you still could not decide which gasoline to pour into the lawn mower, ask your questions to our specialists by phone: 7 (495) 135-29-39 every day from 10.00 to 20.00. They will provide all the necessary information completely free of charge..

Dirty gasoline

Some owners of chainsaws are sure that if the tool works in conditions of constant dust (there is even an air compensator in the carburetor in case of a clogged air filter), it means that it is capable of swallowing gasoline with pieces of rust, and working with small pieces of metal will go to lubricate the chain, so?

This is another common misconception, never use gasoline from the bottom of a canister (especially a rusty one). The chainsaw has a carburetor, in which there are small channels that can clog up from these small particles, which in turn will lead to damage to the chainsaw and contacting a specialized workshop.

Octane number

This is where the fun begins. Can I refuel a chainsaw 95 with gasoline? In all operating instructions for chainsaws, manufacturers indicate in bold type: “Do not use gasoline with an octane rating higher than 92 for preparing the fuel mixture.” It is understandable, but apparently not for everyone. Once from time to time, they bring chainsaws with a burnt-out cylinder to service centers!

Let’s figure out which gasoline is worth pouring into a chainsaw and which is not! For all two-stroke saw engines, you need to use 92 gasoline, the tool is designed for it. Filling 95 gasoline, the engine will begin to detonate (pushing the piston in the opposite direction), something like a micro impact, which will occur almost every revolution of the crankshaft. About 98 gasoline, I think everything is clear, the effect will be even stronger, and it will already be mini strikes.

What gasoline to pour into a chainsaw

Everywhere and everywhere they write and discuss issues related to the choice of oil for a chainsaw, someone recommends only the original, and someone “everything is fine” and on a regular Lukoil 2T! They also raise a lot of questions about mixing gasoline with oil – the process of preparing a fuel mixture for a chainsaw has any more or less human resource. But, no one ever raises the importance of the issue of using gasoline in a chainsaw! Why? After all, all technicians and engineers know how the use of high-octane gasoline affects engines designed to operate on low-octane ones! The chainsaw is no exception!

• How much gasoline is stored
• Octane number
• Dirty gasoline
• Summing up

How much gasoline is stored

During long-term storage, gasoline evaporates (regardless of the brand), a sediment falls at the bottom, it loses its properties, in other words, it deteriorates. It is worth knowing that it is not the gasoline itself that ignites, but its vapors. Therefore, if there is a canister of gasoline in the garage since last year, then think, is it worth it? Better leave him to light the BBQ fire.

The use of “stale” gasoline for a chainsaw entails many problems:

Briggs & Stratton Smart-Fill Instructional Video

• difficult start;
• decrease in maximum power;
• increased wear of the engine parts of the chainsaw.

It is worth remembering that the prepared fuel mixture (gasoline with oil) is stored for no more than a month, after this time it should be disposed of. Using old mixture increases wear on the engine parts of the chainsaw – do not forget about it!

Summing up

In order for the chainsaw to serve for many years, never fill it with old gasoline, and you do not need to use grade 95 and especially 98 gasoline to prepare the fuel mixture, only 92. Also, do not forget about the purity of gasoline – no odens!

I hope that now you are not wondering which gasoline for a chainsaw is suitable and which is not very.

Is it possible to fill in 95 (98) gasoline instead of 92. What will happen to the valves, we analyze the consequences

Not so long ago I wrote an article on the topic of which gasoline to pour 95 or 92 into the engine of my iron horse. The article turned out to be quite popular, especially on the YouTube channel. Readers started asking a lot of questions, and perhaps the most popular one – is it possible to fill 95 or 98 instead of 92 gasoline according to the passport of a car? Will the valves burn out, will the pistons melt? And in general, what will be the consequences. The question is really interesting, so there will be both an article and a video version, in general it is interesting, so we read and watch …

ARTICLES

• 95 (98) and 92
• About gasoline burning
• About power and consumption reduction
• Will NOT burn valves or pistons?
• A few words about American and turbocharged engines
• VIDEO VERSION

Well, at the very beginning, I propose to remember again about the octane number of gasoline. Why yes, because we need to understand what it is for at all.

The octane number is an indicator that characterizes the knock resistance of a fuel. That is, to put it in simple words – the higher the octane number, the higher the resistance to detonation or spontaneous combustion..

Actually, we have already analyzed this in the previous article, you can follow the link at the beginning. But what follows from this? What will be the benefit from using 95 (98) gasoline on a car designed for 95?

About power and consumption reduction

Many people write that they began to fill in 95 (98) fuel consumption fell, and the car began to pull like “mad”! It is not always possible to believe in such words, although there is a little truth in this. Highlighted this item.

Actually, as you can understand from the previous paragraph, the higher the “octane number”, the “softer” and more evenly the gasoline ignites, AND ALSO BURNS LONGER IN THE ENGINE CYLINDERS. And this means the PISTON PUSHES LONGER, let the difference be a percentage, BUT IT REALLY IS. So much for the power you have received – you DO NOT WANT TO WAIT FOR THE MOTOR BOODER TO “REMOVE”, but a little power will be transferred, usually from 3 to 7% (often before an increase of less than 10% is not felt by the driver). Also, fuel consumption will fall by about this percentage, that is, a maximum of 7%, although it all depends on the driver, if you “fry” then not only the consumption will not fall, but on the contrary will increase.

That is, it is possible to achieve savings and an increase in power, but it will be within the margin of error.

About gasoline burning

I would like to explain a little how gasoline of various octane numbers burns, we need this to understand power and a little economy. Yes, I want to note right away that the engine does not burn gasoline itself, but a mixture of gasoline vapors and air. Below is a mixture of a certain octane and air:

• 76 (80) gasoline – burns quickly and not for long, I would even say explosively. Flared up quickly and faded quickly.
• 92nd – the ignition is not so explosive, but gradual, that is, the flame spreads much “softer”, also burning takes a little longer.
• 95-98 – it becomes clear that the higher the “octane”, the softer the flame spread in gasoline (if I may say so), the more even, or something. YES and this fuel burns longer.

Therefore, performance on high-octane types seems softer and the engine runs quieter. DOESN’T SEEM, in fact it is.

Will NOT burn valves or pistons?

These horror stories came to us from old carburetor cars. Where there were often only two types of gasoline 76 and 93. And it was not recommended to pour 93 into the engine from 76! Why? YES, because the carburetor could not automatically adjust the “octane number”, and it turned out that the mixture was still burning in the cylinders, but the exhaust valves were opened and melted by this flame!

YES it was real, but if you adjust the carburetor to use high “octane” fuel, then nothing bad will happen either..

Modern cars, often already allow the use of all types of fuel, in the instructions for use, you can see the following inscriptions:

• 91 to 99
• Not less 92
• Not less than 95
• Recommended 95, but 98 is possible

Etc. What does this tell us, but the fact that often modern motors can operate on almost all modern standards. If, say, in your car, at least 92 is recommended, then this says that you can fill in all types and 92, 95, 98.

If the car is designed for 95, then you can pour 95, 98. BUT if you fill 92 and detonation goes, then the ignition angle will immediately correct the “knock sensor” that is what it is designed for.

That is, modern motors, in the truest sense of the word – SMART! Based on a bunch of sensors, the ECU will make the right decision and launch the necessary algorithm with this particular type of fuel.

So – NOTHING WILL BURN IN YOU, NOT A VALVE, NOR MORE PISTONS.

A few words about American and turbocharged engines

I was also bombarded with such questions – “I bought a car driven from the USA, it says that you need to pour AKI 91 gasoline. What is it, and what kind of fuel should I choose?”

The US market has slightly different standards, their classification is not like our AI (that is, “research”). Abbreviation AKI, stands for – conventional, average designation of two indices ((“research” “motor”) / 2).

If we get closer to our standards, we get something like this:

AKI87 = AI92

AKI89-91 = AI95

AKI93 = AI98

I would also like to note the turbocharged versions, in the last article I said that it is recommended to pour in them at least “95”.

Let’s think logically, why 95 and 98? Turbocharged engines use much larger volumes of air and fuel, the mixture in them should be more enriched, and from the points above, we understood what REDUCED fuel is, it gives us a higher octane. Think for yourself – WHY TO BUY TURBO, and FURTHER FEED IT WITH LONG MIXTURES, it is simply not designed for this! The amount of air must strictly correspond to the calorific value of the fuel.

It is also worth noting that when using the “92”, as many manufacturers point out, the “desired temperature regime” may be violated, which may lead to the failure of some units, in particular the “turbine” itself.

Therefore, in TURBO, only what the doctor ordered, otherwise it is fraught with repair.

Now video version of the article, VERY USEFUL.

I end on this, I think it was useful, sincerely YOUR AUTOBLOGGER.

(42 votes, average: 4.50 out of 5)

95 (98) and 92

The difference between these gasolines is not so great, especially if we take the two closest ones, for example, 95 and 98.BUT as we understood from the definition from above, the higher the octane number, the greater the compression ratio it can withstand.

That is, the 92nd can withstand a compression ratio of approximately – from 9 to 11.

95th, already from 11 to 12.5

But the 98th, up to 14

That is, if your engine is designed for the 92nd, and you fill it with, say, the 95th, then THIS WILL AFFECT ITS WORK. Since spontaneous ignition is further reduced. I am already silent about 98 gasoline. High-octane fuel will ignite in the engine precisely from the spark plug, and not from the compression ratio.!

Guys, remember, often the additives that increase the “octane” are designed specifically to reduce ignition at high compression ratios. But the composition of 92, 95, and 98 is often the same! Not always, of course, nevertheless, some branded gas stations add all sorts of detergent and combustion-improving compounds to gasoline, but often this is SO!

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You bought yourself a new petrol trimmer and immediately got into trouble with it. It starts very badly. If you mow a little, and then turn it off, then turning it on “hot” is an even bigger problem than “cold”. What to do with it, I don’t know how to get it right?

The instruction for the lawn mowers plant sounds like this:

Switch on ignition.

Pump up fuel with a silicone button (primer) located on the bottom of the carburetor. Pressing must be done as much (or a little more) as written in the instructions, usually about 8-10.

Close air damper.

Lock the throttle lever with a stop button at high rpm.

Pull the starter handle 2-3 times. The engine should “grab”.

If the engine “grabs” and stalled, then you need to move the choke to the 1/2 position and try to start again. If the engine starts, then we release the gas and move the air damper to the “open” position. Getting started.

When performing fuel pumping manipulations, one should not be afraid to pour it over. If this happened, and, as they say, “filled the candle”, then you do not need to unscrew it, it is enough to move the air damper to the “open” position and, while holding full throttle, simultaneously turn the engine with the starter 2-4 times. After that, you can start the engine and get to work..

Any braid has a knife on the protective cover, which cuts off excess fishing line after winding, and the cable is no longer cut. If part of the cable breaks off, then the result is an imbalance, increased vibration. Bottom line: shaft drive bearings break.

During the engine running-in period (this is approximately the work of the trimmer on 2-3 tanks), the amount of oil can be increased. For example, mix it with gasoline in a 30: 1 ratio.

A small amount of oil mixed with gasoline leads to increased wear of the cylinder-piston group. An excess of oil in the mixture, although not so fatal, is also harmful. Coking of the piston rings, rapid formation of carbon deposits in the combustion chamber, and a drop in engine power may occur. In addition, the muffler mesh screen is coked. Therefore, some users (after the end of the warranty period for the trimmer) recommend dismantling it..

The gasoline used in the lawn mower is AI 92. The brand of gasoline is precisely specified in the operating instructions. You should not try to “force” the engine by pouring 95th gasoline into it. This can cause overheating, erratic trimmer operation and breakage..

It is not recommended to leave fuel in the trimmer tank during extended shutdowns. It is better to end the working day with the entire mixture completely exhausted. If this is not done, then, since the gasoline will evaporate from the engine overnight, and a thin film of oil will remain, the carburetor jets may become clogged. This will cause difficulty the next time you start the engine..

It is also necessary to observe safety precautions when storing fuel. Many people pour gasoline into a plastic water bottle. Is it worth doing this?

The numbers mean the following: one part of the oil takes fifty parts of gasoline. Hence: 1000 ml (1 liter of gasoline) is divided by 50, we get 20 ml, that is, 1:50.

Thus, you can calculate the composition of the fuel mixture (gasoline / oil) in any proportions. To add oil to gasoline not “by eye”, you can advise to take a 20 ml medical syringe, draw oil into it and “inject” into a container for preparing a fuel mixture.

In no case should you store gasoline in a plastic container from under water. When mixing the fuel mixture, a static charge accumulates, you can “catch” a spark.

Therefore, at gas stations it is not allowed to fill gasoline in plastic cans, only in metal ones. Before pouring gasoline into a metal canister, it is better to put it on the ground, so static is removed from the body.

But there are situations when simple manipulations with the lawn mower do not help. The engine still won’t start. In this case, we are going to check the power supply and ignition system, guided by the rule “the engine does not work if there is nothing to burn or nothing to ignite”.

Also, the ignition coil may be punctured in electrical equipment. In this case, the lawn mower will not start, or it will start and work intermittently, and then it stalls, or it will not start at all when it is hot..

You can check the coil’s serviceability in the same way as when checking the spark: we unscrew the candle, lean it against the trimmer body. If there is no spark when you jerk the starter, or it appears every other time, you need to change the coil.

Useful material from which you will learn how to start a naughty gasoline trimmer that does not want to work!

The summer time has come, and lawn-mowers clatter as usual on the personal plots. Great tool, powerful and mobile. With the help of a gasoline trimmer, you can cut the grass and get rid of the dried weeds. However, there are times when the lawn mower will not start, work intermittently or not at full capacity. There is certainly no time for work! And as they say, you pull the starter handle more than you mow.

Launching difficulties arise not only for seasoned lawn mowers, but also for new ones. How to be in this situation? There is only one way out – to heed the advice of experts and take advantage of their practical experience.!

How to Choose the Right Fuel for Your Mower

Fuel mixture: the proportion of oil and gasoline for the chainsaw

The chainsaw engine is the heart of the tool, so it is very important to use a properly prepared fuel mixture..

The fuel mixture for a chainsaw is prepared from two components – oil and gasoline. Chainsaws are equipped with two-stroke engines, so oil is not added to the lubrication system (like in a four-stroke engine), but directly to gasoline. In this case, it is very important to observe the correct proportions of ingredients, of course, in no case try to work on pure gasoline, because in this way you will very quickly “kill” the chain saw.

If we talk about what kind of gasoline to pour into the chainsaw, then it will be optimal to use fuel with an octane rating of A-95, in this case the savings on fuel can turn out to be deplorable. Often European manufacturers indicate that it is possible to use A-90 or A-92 gasoline, but in post-Soviet countries the quality of gasoline is inferior to that of Europe, so in our realities it is better to use better quality gasoline..

As for the proportion of the petrol-oil mixture itself, everything is simple here: you must follow the instructions for the tool. All manufacturers of chainsaws indicate the required ratio in the instruction manual or in the passport of the tool, in addition, the proportions for refueling the chainsaw may differ depending on the model of the chain saw. As a rule, the proportion of oil and gasoline to a chainsaw of famous manufacturers is a ratio of 1:40 or 1:50, which means 1 part of oil for, for example, 40 parts of gasoline. Now arithmetic 1 liter of gasoline = 1000 ml of gasoline, divide by 40 and we get 25 ml of oil. If you follow the same steps to a ratio of 1:50, you get 20 ml of oil per 1 liter of gasoline. As for budget chainsaws made in China, the situation is slightly different. The ratio of gasoline to chainsaw oil made in China 1:25, that is, divide 1000 ml of gasoline by 25, we get 40 ml of oil. The thing is that in branded chainsaws, a solid assembly and the distance between pistons and cylinders in the engine is much less than that of Chinese chainsaws, therefore, the required amount of oil differs almost twice.

Use a regular medical syringe with sufficient volume to measure the correct amount of oil..

Another subtlety – first fill the dry gasoline can with gasoline and then oil. The procedure, on the contrary, is fraught with a low quality fuel mixture, because the oil is more dense, it will stick to the bottom of the canister – what a good mixing here.

Be sure to prepare the fuel mixture in a canister and pour ready-made special fuel into the gas tank! Never cook or mix directly in the fuel tank of your chainsaw!

If you figured out the question of how to breed gasoline for a chainsaw, then on storage conditions and shelf life of the fuel mixture it is worth saying a few words. It is best and easiest to prepare a petrol-oil mixture for 1 liter of gasoline, it is recommended to do this immediately before working with the tool. Chainsaw fuel tanks have a volume of 0.3 to 1 liter. In the conditions of domestic use, the entire volume of the prepared combustible mixture is rarely used in one session, so the remainder can be saved until the next session. It is necessary to store the fuel mixture in a special canister for gasoline, in a dry, dark place. It is optimal to count that the shelf life of the finished mixture will be 7-10 days. The fact is that the oil on the market now is not synthetic, but organic, that is, natural. After 10 days, all lubricating properties are lost, gasoline simply “eats up” the oil. Naturally, it is no longer possible to use such fuel, this can cause breakdown and failure of the chainsaw.

At the end of the work, it is necessary to drain the fuel mixture, start the chainsaw, the tool will stall (so that the saw has a dry carburetor) and now you can leave it until the next operation..

Unsuitable fuel mixture must be disposed of..

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How to explain such strange results? After all, the higher the octane number, the, in theory, the better the economy and power characteristics. That’s how it is, but not always.

The fact is that the external speed characteristics of the engines are removed by the plant on AI-95 gasoline – these are exactly what are stated in the passport data. Ten or fifteen years ago, even in cars with simple eight-valve engines, AVTOVAZ allowed only “ninety-fifth” to be injected. And it is this gasoline that is still recommended for Grants, Kalina, Priora and Niva!

And why on other front-wheel drive cars with the same 106 ‑ horsepower 1.6 engine, the permissible grade of fuel depends on the model? Marketing! Competitors allow “ninety-second” – and in the struggle for a buyer AVTOVAZ is forced to make concessions. That is why AI-92 gasoline was included in the list of acceptable grades. For cheaper gasoline, the settings of the control unit were changed, which entailed a slight decrease in engine power and car dynamics. What we have fixed.

And motors are simply not calibrated for more expensive AI-98 and AI-100 gasolines. The control unit is sharpened for engine operation at a maximum of “ninety-fifth” and does not adapt to higher-octane gasolines. Consequently, the power does not grow either. Of course, in some narrow transient modes, the “hundredth” gasoline is able to give a certain increase (for example, in the acceleration efficiency from 80 to 120 km / h), but it is not so significant and will be washed out against the background of other indicators.

Lada Vesta SW Cross 1.8 MT
(manufacturer’s data)

Power 122hp at 5900 rpm
Torque 170Nm @ 3700rpm
Acceleration 0-100 km / h 11.2 s
Maximum speed 180 km / h
Fuel consumption: urban / suburban / combined cycle 10.7 / 6.4 / 7.9 l / 100 km
Recommended gasoline minimum AI-92

With device

With a professional measuring complex VBOX, we first measured the acceleration time to hundreds. The station wagon with “ninety-second” gasoline in the tank gained 100 km / h in 12.0 seconds. On “ninety-fifth” gasoline, he accelerated more fun: 11.3 seconds. Maybe AI-100 will breathe even more power into the motor? Alas – the same 11.3 seconds. Like a carbon copy – history with consumption, only seconds instead of liters.

Sedan? Long 14.8 seconds to the first hundred on “ninety-second” gasoline – ardent greetings from the AMT robot with its rubber switches. On the AI-95, the 1.6 engine cheered up a little: minus six tenths of a second.

And finally, the “hundredth” gasoline showed itself, allowing it to run out of fourteen seconds and improving the result on the “ninety-second” by almost a second.

Now – transitional regimes, or elasticity. Acceleration from 60 to 100 km / h in fourth gear and from 80 to 120 km / h in fifth.

The elasticity of the “cross” Vesta in the transition from “ninety-second” to “ninety-fifth” improved slightly. The gain is a few hundredths in different modes, whether it is acceleration from 60 to 100 km / h in fourth gear or from 80 to 120 km / h in fifth. The most noticeable difference was recorded during acceleration in fifth gear from 60 to 100 km / h – more than one and a half seconds were won back.

AI-100 gave nothing even here. Several hundredths of a second in all measurements of the elasticity of SW are not even crumbs, but fleas. The sedan did not at all demonstrate any advantage in elasticity on different fuels. Moreover, on the “hundredth” gasoline, it even worsened!

How so? Indeed, in theory, the opposite is true!

Lada Vesta 1.6 AMT
(manufacturer’s data)

Power 106 HP at 5800 rpm
Torque 148 Nm at 4200 rpm
Acceleration 0-100 km / h 14.1 s
Maximum speed 182 km / h
Fuel consumption: urban / suburban / combined cycle 9.3 / 5.5 / 6.9 l / 100 km
Recommended gasoline minimum AI-92

At the stand

All the dots above the “i” have placed the measurements on the dyno. Inzhkar has kindly provided the latest professional Dynomax dynamometer for our testing. Any measurements can be taken on it, and thanks to the powerful air blowing system, the test does not turn into torture for the car’s cooling system.

We spent more than one hour “on the drums” and got graphs of the power of both engines on different gasoline. On the AI-92 and AI-95, the cars produced results very close to the passport values: the Vesta 1.6 sedan showed 103.5 and 103.6 hp. respectively (106 hp declared), and the Westa SW Cross 1.8 station wagon produced 119.3 and 119.7 hp. (declared 122 hp).

Curiously, the curves of power and torque on the “ninety-second” were even a little smoother. And at the “hundredth” power … did not reach the parameters declared by the manufacturer 9-10 “horses”! Now it’s clear why the dynamics have barely changed..

What is what

In each Vesta, in turn, we fill in Lukoil Ecto gasoline of different grades: first AI-92, then AI-95, and for dessert – elite AI-100. The instruction manual requires observing only the lower bar – this is AI-92 gasoline. No upper bound.

We will compare not only fuel consumption, but also dynamics, and then drive the cars to a dynamometer – in order to determine the maximum power and torque on the wheels using instrumental measurements.

The method for measuring fuel consumption is extremely simple. We burn out the remains of gasoline in the tank until the engine stops and fill in ten liters of test fuel. We develop it until the engine stalls again, and record the mileage traveled. By simple recalculation, we get the average fuel consumption.

Arrivals were carried out at the same time in similar weather. To minimize the measurement error, the canisters were filled on one dispenser (from the corresponding pistols, of course) at the same gas station..

The driving mode is a quiet highway. We keep 110 km / h evenly. Each car is driven by the same driver throughout the test – to avoid scattering results due to “change of leg”.

Bon appétit!

First, fill in AI-92. When the trip computer of the first Vesta issued dashes (the minimum numerical remainder of the power reserve is 30 km), we prepared for the fact that the engine was about to stall. It was not so! As it turned out, cars easily pass several tens of kilometers before the engine stops..

Vesta showed absolutely the same average consumption of “ninety-second” – 6.7 l / 100 km. We take it as a starting point for subsequent measurements. An interesting detail: the trip computer of the five-door SW Cross gives out consumption almost without twisting, but the sedan underestimated the result per liter (it showed 5.7 l / 100 km in this mode), and the alignment was repeated in subsequent measurements. Very strange behavior – the constructive structure of the counters is the same.

We pass to AI-95. Both testers failed to catch the difference in the behavior of each of the cars on the higher octane fuel. The resulting fuel consumption was not surprising either: the SW Cross wagon dropped one “top ten” – up to 6.6 l / 100 km. A less powerful sedan saves a little more: minus 400 ml, the result is 6.3 l / 100 km. But given the same ride feel, why pay more? Without a calculator, it is obvious that in such modes it is cheaper to drive the AI-92.

For dessert – AI-100. And then a surprise awaited us. Neither SW Cross nor “simple” Vesta could improve the result of the “ninety-fifth”! Elite fuel did not give any advantage, and the elasticity of the 1.6 engine was even worse. Although this is not such a sensation: almost five years ago, we already tested the Chevrolet Cobalt and Nissan Almera sedans in a similar way (ЗР, № 12, 2013), and then the “premium” AI-98 also did not surprise.

But this is driving in a steady state. Perhaps instrumental measurements of dynamics will open our eyes?

Should I upgrade to 92nd? Experiment ZR

Russia is one of the largest oil-producing countries, but our gasoline prices do not fluctuate with, and premium AI-98 and AI-100 have jumped far beyond the psychological boundary of 50 rubles per liter. And the eternal dispute about the optimal choice of gasoline flared up with renewed vigor.

Many suddenly remembered that their cars can be refueled “in ninety-second”. and for the sake of economy switched to it.

Others are still convinced that the expensive “ninety-fifth” and even more so “ninety-eighth” provide the car with the best dynamics. And with a quiet ride on high-octane gasoline, they say, the consumption falls – and it will come out even cheaper than on the “ninety-second”!

Do similar theories work for cars with modern, but not highly accelerated engines??

We took two editorial Vesta. Sedan with a 1.6-liter engine producing 106 hp. and the AMT robot symbolizes the choice of a person who is not in a hurry: you don’t need a lot of power, the box switches itself – that’s nice. The SW Cross station wagon with a 1.8-liter 122-horsepower engine and a manual transmission is sure to be preferred by those who want to always have a “headroom under the pedal”.