What oil can be used to dilute gasoline for a chainsaw

Fuel quality

If you want the tool to do its job perfectly and last for more than one year, you must provide it with fuel and lubricant of the proper quality.


Not only the quality and proportion of fuels and lubricants is important (although it is dominant in this matter), but where and how (how) gasoline is diluted with oil for chainsaws.

The technology provides for the use of containers with graduated divisions, some brands (along with chainsaws and oil) produce containers for mixing and storing fuel. Made of special non-combustible material, they are produced in the form of a canister or bottle, often endowed with measuring lines, and some of them have two entrances (separate for each type of fuel and lubricants).

Often, improvised means are used for mixing:

  • Plastic / glass bottles;
  • Syringe (no needle);
  • Measuring cups;

When using household products, be extremely careful, as during the mixing process, when combustible material interacts with the surface of non-specialized containers, static electricity can be generated. this is fraught with an explosion. When making a mixture, oil is added to gasoline, since it has a higher density.


  • High quality fuels and lubricants;
  • Correct proportions;
  • Mixing tools and technology.


According to the international classification, oils of the following markings are used for chainsaws:

  • API-TB;
  • API-TS;
  • JASO-FB;
  • JASO-FD.
  • Use oil for 2-stroke engines only;
  • Do not use the material after the expiration date;
  • It is strictly forbidden to add mining (it contains many unnecessary impurities. harmful to the central mechanism of the chainsaw);
  • You can not use chain lubricant (for each device: chain and engine. it is its own);
  • It is preferable to use synthetics or semi-synthetics (during development, it almost does not form combustion products, but the price of such material is higher than that of mineral oils).

How to dilute gasoline with chainsaw oil

The surest solution is to follow the recommendations specified in the instructions for the product! In the absence of such an opportunity, you can use a special fuel preparation formula.


According to experts, it is necessary to use unleaded fuel with an octane rating exceeding 90. Gasoline A92 and Ai92 is considered ideal. You can use the 95th, but there is an opinion that it is better to refrain from this kind of gasoline, since some of them are made on the basis of the 92nd with the addition of additives. The latter, in turn, are harmless for 4-stroke car engines, but they will be superfluous for the “sensitive” mechanisms of 2-stroke motors.

It is recommended to use fresh gasoline for chainsaws, since when stored in cans the fuel can lose its octane properties.


There are several options for the ratio of fuel and lubricant. As a rule, this number ranges from 20 to 50 ml of oil per 1 liter of gasoline.

Again, you must follow the instructions for the product or the recommendations indicated on the oil label (priority of the instruction). In the absence of such, before diluting gasoline, you need to pay attention to the power indicator of the product, since the created proportion directly depends on it.

For chainsaws with power:

  • Up to 1.5 kW, the recommended ratio is 25 ml of oil per 1 liter of gasoline;
  • Above 1.5 kW 20ml / l.

In gasoline for a chainsaw, it is allowed to add oil a little more than the recommended proportions (up to 5 ml per 1 liter). In this case, you should be extremely careful, because non-observance of the proportions can lead to breakdown, and as a result, expensive repairs.

If gasoline is diluted with a large volume of oil, then during operation the number of shock loads on the cylinder-piston system will be increased, and carbon deposits may also form, as a result of which the CHP will fail.

Adding a small amount of oil to gasoline for a chainsaw can lead to insufficient lubrication of the surfaces of moving elements, which will lead to additional friction of the elements and their heating, followed by the destruction of the entire mechanism.

Chainsaw Bar Oil vs Motor Oil

Fuel mixture preparation rules

It is necessary to dilute gasoline with oil in containers that are resistant to the effects of petroleum products (plastic or metal canisters). It is not recommended to use plastic bottles from under water, juice or milk for these purposes, as food grade plastic decomposes under the influence of gasoline. As a result of this process, the fuel mixture will change its properties, and it is difficult to predict what effect it will have on the engine.

The combustible mixture for the chainsaw is easy to prepare.

  • Take the required amount of lubricant and pour it into the prepared container. Do not pour all the prepared gasoline into a container with oil, half of the required amount will be enough.
  • Slightly shaking the container, wait until the lubricant is completely dissolved in gasoline.
  • Now you can fill in the remaining gasoline, mixing it well with the mixture in the container. This completes the preparation of the fuel mixture for the chainsaw.

Before each refueling of the chainsaw, the combustible mixture must be shaken. Also, do not forget to tighten the fuel tank cap well, otherwise this will lead to a lean mixture and engine failure.

It is better to use the ready-made fuel mixture immediately. Therefore, it must be prepared in such an amount that it is enough for the expected volume of work. If, nevertheless, the mixture remains, then it is impossible to store it for more than 1-1.5 months. During this time, it will lose a significant part of its lubricating properties.

How to dilute gasoline for a chainsaw

Consider how the mixture is prepared for a chainsaw. It is necessary to calculate the correct ratio of gasoline and oil for the chainsaw. For a chainsaw, they take fuel with a high octane index: AI-92 or AI-95.

Read more:  How Much Oil To Gasoline For A Chainsaw

used, dilute, gasoline, chainsaw

To prepare the fuel mixture, it is necessary to add 30 g of oil to 1 liter of gasoline, which corresponds to the design of the saw. The resulting fuel fluid is poured into the fuel compartment. Before diluting gasoline, you should consult a service specialist who specializes in the repair of chainsaws.

In order for the saw to have a long service life, it is necessary to properly prepare a gasoline-oil mixture, for which only AI-92 and AI-95 brands can be used. The fuel must be unleaded, otherwise the internal combustion engine may break down. Do not use an old product that has expired, because over time, the fuel can change the octane number. The proportion of lubricant and fuel is strictly adhered to.

You should not save when choosing oil for Husqvarna chainsaws and others. The proportions must be observed due to the fact that excess oil can lead to the growth of carbon deposits on the chainsaw units. Excess gasoline can cause damage to the piston and damage to the internal combustion engine. So, 1 liter of fuel is mixed with 20-50 ml of oil. Husqvarna recommends adding 100 ml of grease to 4 liters of gasoline. This proportion is suitable for saws with a power of up to 1.5 kW.

For structures with a power of more than 1.5 kW, an oil ratio of 1:50 is used. That is, it is necessary to dilute gasoline like this: add 5 liters of gasoline for a chainsaw to 100 ml of oil. Partner recommends when refueling the chainsaw with fuel, dilute the fuel fluid at the following rates: add 100 ml of lubricant to 3.3 liters of fuel.

When using supersynthetic oils, the indicators are 1: 100. That is, the fuel mixture for the chainsaw must be prepared according to the recipe: add 100 ml of lubricant to 1 liter of fuel. When choosing components, you need to use the information that is given in the instructions for any modification of the saw.

Plastic bottles and other containers are often used to mix ingredients. Be careful with plastic and glass. Mixing the components may generate static electricity. Care must be taken to prevent pebbles, sand or water droplets from entering the fuel mixture. The fuel mixture must be mixed well. The prepared fuel mixture should not be stored for more than a month, as oxidation of materials may occur, and the composition of the mixture will change.

Engine breakdown, which was caused by expired fuel, is recognized in the services not under warranty. At the same time, the cost of repairs can reach 80% of the price of a new design.

After all work with the use of a chainsaw has been completed, you need to spend the remaining fuel, turn off the engine, remove the remaining mixture.

For the best operation of the device, it is necessary to make a mixture that will ensure uninterrupted operation of the engine, complete combustion of the gasoline-oil mixture without the formation of carbon deposits, smoke or damage.

Is it possible to pour 95 gasoline into a chainsaw?

In almost every operating manual, you can find instructions from manufacturers that for regular refueling of household tools you need to use gasoline with a constant octane number of no higher than 92. Despite this, many novice gardeners continue to refuel their saws with 95th gasoline, in vain believing that he is better.

It should be remembered that the engines of all imported and some domestic tools were originally designed to operate on 92nd gasoline. If 92 gasoline is poured into the fuel tank of the instrument, this will lead to a push of the piston into the counter-duct, which is often called detonation. This dangerous process will become cyclical, and will be repeated with each revolution of the engine crankshaft. Probably, there is no need to say that the use of 98th gasoline will even worse affect the operation of the piston and the state of the chainsaw engine.

How to refuel a chainsaw

Let’s take a look at how to refuel your chainsaw. Failure to feed the saw correctly could pose a threat to the life and limb of the operator.

There are rules that must be followed when refueling the saw:

  • do not spill oil and fuel mixture;
  • the place where the saw will be refueled must be flat;
  • the place must be more than 2 m away from the area where the device will be used;
  • the site must be located away from fire; no smoking in this place;
  • while the fuel tank is filling, you need to fill the oil tank, which is intended for automatic chain lubrication; you can distinguish containers by special icons;
  • before pouring, wipe the container necks with a rag;
  • during operation, grease and gasoline must not be spilled, so you need to be careful when unscrewing the canister caps; when refueling, it is better to use a funnel;
  • care should be taken when tightening the lid with the latch;
  • experts advise not to fill the container completely, but to leave some free space.

During the operation of a properly refueled chainsaw, it is necessary to regularly check the tightness of the containers and the operation of the motor. If the chain gets too hot, or gasoline is consumed too quickly (faster than oil), this should alert you. Before starting work, the chainsaw is run in.

With proper operation of the chainsaw, 1 tank of gasoline should be enough for 30 minutes of operating the device at maximum load. When gasoline runs out, there is still grease in the second container, but in a small amount.

Risks of using fuel and oil surrogates

To avoid premature failure of the chainsaw, it is recommended to refuel the tool with exclusively high-quality and branded consumables. Finding such materials is not difficult, as they are usually sold in branded retail outlets. The use of low-quality gasoline can lead to engine failure, therefore, it is recommended to buy fuel at such filling stations where high quality fuel is guaranteed.

Read more:  Carburetor Adjustment Stihl 280 Chainsaw

It is categorically contraindicated to mix gasoline with motor oil for cars, since it is not at all intended for such purposes. Compliance with the number of proportions, as well as the use of high-quality materials will extend the life of your tool for many years.

Chainsaw sprocket oil. manufacturer tips

In order to reduce the friction of the drive sprocket and extend the service life of the mechanism, each manufacturer completes it with a needle bearing that needs periodic lubrication. Many experts advise using Stihl’s multi-purpose compound for this.

This tool is quite expensive, so some gardeners and professional fellers use lubricants at a lower cost. Compounds such as Litol or Litol 24 have proven to be effective agents against increased needle bearing friction.

The same oils can be used to lubricate the driven sprocket of the chainsaw, as well as to protect the drive sprocket. A small syringe is suitable for adding them. It will quickly press lubricant into small holes in the tire and next to the bearing located above the sprocket.

What to use chainsaw oil?

To find out exactly which oil to use to lubricate your chainsaw chain, you will need to consult the manufacturer’s instructions. Almost all tool manufacturers recommend pouring a product that stands out with the highest adhesion properties. This means that the material used to lubricate the chain must adhere to the metal surfaces of the chain and bar.

It is necessary to figure out why the adhesive properties of the lubricant. During the movement of the chain on the standard bar, the saw element reaches a high speed. If you use low-adhesion chainsaw chain oil for lubrication, more than half of the liquid will fly off the top of the tire by inertia, never reaching its bottom. As a result, such oil will show itself to be ineffective, and the tire together with the chain will quickly fail due to constant friction.

Chainsaw Oil to Gasoline Ratio

Every chainsaw company tunes engines and base carburetors to operate with a different amount of lubricant. Therefore, the proportion of oil and gasoline for your chainsaw may differ slightly.

Most often, when mixing fuel with oil, manufacturers advise using proportions of 1:50, or 1:40. This means that 1 part of engine lubricant must be mixed in 50 or 40 parts of fuel, respectively.

It is quite easy to translate the proportion into a more accessible formulation. For example, 1 liter of fuel contains 1000 ml. If 1000 ml is divided by 40, then you get 25 ml. This means that 25 ml of lubricant will need to be diluted for 1 liter of gasoline. The same formula should be used when the manufacturer recommends preparing the fuel mixture exclusively in a 1:50 ratio. To do this, 1000 ml must be divided by 50, resulting in 20 ml. This means that 20 ml of motor lubricant should be diluted in one liter of fuel.

Things are a little different with Chinese chainsaws. Their manufacturers advise to dilute the gasoline for the chainsaw in a ratio of 1:25. This means that owners of Chinese tools need to stir exactly 40 ml of lubricant in 1 liter of pure gasoline. This ratio is due to the fact that in terms of assembly quality and selection of components, these chainsaws are slightly inferior to their Western counterparts. In engines of American, European and Japanese models, the distance between cylinders and pistons is much less than that of chainsaws from China. In this regard, the amount of lubricant required to operate the former. far less.

How to dilute gasoline with chainsaw oil

The chainsaw is used when cutting trees, in repair work. The popularity of this tool is growing every year. Each owner buys it for his own house. However, in order to use it for a long time, it is necessary to properly care for the instrument. Only with good care will the saw serve a long life and will not harm your health.

This is especially true in a gasoline-oil mixture. It must be diluted and poured strictly according to the instructions that will be given below.

Proportions for Swedish Husqvarna chainsaws

Depending on what power is required to be obtained from the units, the appropriate component dilution is selected:

In one liter of fuel, 40 to 50 parts of oil are diluted. These are the ideal proportions of gasoline and oil.

Along the way, we inform you that only unleaded gasoline of the AI-92 or AI-95 brands is used. Leaded combustible product is considered a poor choice for internal combustion engines, as it shortens the engine’s service life.

Mixing rules

Even experienced lumberjacks do not always correctly mix the fuel mixture for a chainsaw if the work is done in a hurry.

The algorithm of actions is as follows:

  • prepare a plastic container containing 2.5 liters or less;
  • a measuring container must be present. many use a conventional medical syringe;
  • first, fuel is poured into the container, and then an accurately measured portion of oil;
  • the finishing task is scrupulous dissolution of the oil product by actively shaking the consistency.

When making a mixture of gasoline and oil, you should adhere to the prohibitive action. you must not try to mix it in the gasoline tank of the tool.

After that, the finished flammable product is recommended to be stored for 14 days. If more, the oil will settle to the bottom of the container. A new shake-up of consistency is required. Busy people often forget about this.

Working proportions of the fuel mixture

The standard gasoline to oil mixture ratio for carburetor chainsaw engines of various models is 40: 1 and 50: 1. This proportion provides full lubrication of the rubbing parts of the crank mechanism and piston group, and also does not prevent the complete combustion of the gasoline-air mixture.

Read more:  Tuning The Carburetor Of A Chinese Chainsaw

Taking into account external factors, the fuel mixture can be adjusted in the direction of increasing the amount of oil. Such a need arises at the stage of running in a new tool, as well as at high air temperatures. In this case, the standard oil dosage is increased by 20%.

In practice, an increase in the percentage of oil in the fuel mixture is used if its characteristics do not fully meet the stated requirements. How much oil per liter of gasoline is needed in each case is determined by the sawman himself.

What are the proportions to dilute the components for the mixture

The high-quality operation of the chainsaw will depend on the correct filling of the chainsaw with a mixture of lubricants and fuel. To determine the proportion of the components and how to dilute the fuel, it is recommended to read the instructions. If you have forgotten how to dilute, or have lost the instructions, you can go to the Internet for help. It should be said that the proportion between oil and gasoline for a chainsaw must be observed exactly.

The most common gasoline to oil ratio is 1:50.

That is, one liter of gasoline is diluted with twenty milligrams of lubricant. This ratio is quite suitable for tools whose power is more than one and a half kilowatts per hour.

For those chainsaws whose power is less than one and a half kilowatts per hour, it is recommended to mix gasoline with oil in a ratio of 1:25. That is, one liter of gasoline is diluted with twenty-five milligrams of engine oil.

It must be remembered that the presence of a large amount of oil in gasoline will lead to rapid wear of parts. When the level is exceeded, the load on the cylinder and piston increases. Carbon deposits form faster.

In addition to the instructions, you need to know what kind of oil you need to add for the chainsaw. Since there are many varieties, it is difficult for the ordinary owner of a chainsaw to choose the best one offered. Let’s consider some of them.

Gasoline and oil proportions

For example, Stihl, together with quality saws, produces special lubricants that are used in these tools. Special oils are produced by companies such as:

The above three companies are also manufacturers of chainsaws and special lubricants for them. The next step in proper tool maintenance is the saw refueling algorithm.

Mixing ratio for “Stihl

The German family-owned company Stihl has production facilities in many countries around the world. The office is located in Waiblingen. Among the assortment produced for the needs of forestry, a pride of place is taken by means of small mechanization.

Today the Stihl chainsaw has entered a liquid golden age:

The manufacturer has set the standard for oil dilution at a ratio of 1:50. The proposed proportion establishes the possibility of diluting 1 part of oil in 50 parts of gasoline. Or in a ratio of 1:40.

The calculation is simple. We know that 1 liter of flammable liquid equals 1000 milliliters. Divide the value by 50, we get 20 milliliters of oil. According to a similar algorithm, its volume is determined, recommended in a ratio of 1:40. Making simple calculations, we get a value of 25 milliliters.

Self-selection criteria

A large assortment allows you to choose oil that fully corresponds to the class and characteristics of the chainsaw, the conditions of its subsequent operation.

  • For budget models, you can use oils of the Standard category, for professional chainsaws, consumable lubricants of the Super and Ultra categories are recommended.
  • To prepare a full-fledged fuel mixture for a chainsaw, it is advisable to use branded oils or their branded counterparts recommended by the operating instructions. In particular, Stihl and Husqvarna engine oils of the same composition and application are completely interchangeable.

Experts recommend that owners of chainsaws exclude from the scope of attention motor oils intended for two-stroke engines of mopeds, boat motors and other mechanized household appliances.

The power units of this equipment operate in more comfortable conditions, which makes the requirements for their operational characteristics less stringent.

Storage advice

It is better to prepare the mixture in an amount that should be enough to perform one-time work. The problem lies in the irreversible deterioration of the working properties of the mixture during storage. The finished composition is recommended to be used over the next few days.

A mixture of gasoline with a month-old oil impairs the traction capabilities of the engine. There is also the formation of resinous compounds in the fuel system and intense carbon formation in the combustion chamber, loss of mobility of the piston rings.

  • With minimal damage to quality, it is advisable to store gasoline with oil for no more than 2 weeks. At an ambient temperature of 25 degrees Celsius or more, this period is reduced to 8-10 days.
  • In order to save money, the expired mixture can be gradually consumed by mixing it into the fresh composition in an amount of no more than 10% of the total volume.

In order to avoid problems associated with the failure of the fuel system, it is recommended to filter the prepared mixture through a non-fiber material such as suede, or a fine-mesh twill weave, a metal mesh.