What oil to put in your 4T lawnmower?

PATRIOT Power Active 2T

your, lawnmower

PATRIOT POWER ACTIVE 2T mineral oil for use in two-stroke engines with a displacement of up to 200 cm3 in garden equipment, such as chainsaws, grass trimmers, shears, blowers, lawn mowers, motor pumps, etc. The oil is completely pre-mixed with the fuel and ensures perfect lubrication under high loads. It forms a protective film on the mowing surfaces. Good prevention of corrosion, wear and deposit formation on the piston. Helps keep engine clean and reduces smoke. Significantly extends the life of the engine. Contains no mechanical impurities and water. Convenient dispenser allows you to measure the exact amount of oil and makes it easier to overfill.

TD semi-synthetic oil

4TD PREMIUM SAE 10W-30 series is a quality product, designed for the all-season use in four-stroke engines with air-cooled engines. This semi-synthetic oil can withstand intermediate temperatures from.25 to 40 degrees Celsius and extends its range of use considerably.

When compared to a mineral oil, the main difference is the instantaneous formation of a protective layer between the running and friction surfaces, even when the machine is started. Thanks to the excellent structure that makes up the base, the oil resists deposits resulting from increased loads and elevated temperatures. Semi-synthetics also prevents formation of oxidation on parts.

Classification of motor oils

The most important parameters of the engine oil are viscosity and temperature range, at which it can be used. The number before the W in the designation indicates the temperature at which the fluid thickens. The number after the letter indicates the maximum temperature at which the fluid will provide trouble-free engine operation. These figures must correspond to those in the garden cultivator operator’s manual. Also note that different high-viscosity lubricants should be used in winter and summer. SAE 30 and SAE 40 are designed for summer use, higher viscosities like 5W30 for winter use. Low-friction product at high temperatures will quickly evaporate and will not be able to provide proper lubrication of mechanisms. A fluid that is too thick will be a hindrance to starting a motor at low air temperatures.

Chemical composition of lubricant base is also important, because it affects the properties of the product and determines its impact.

Mineral motor oil:

  • provides reduction of friction force;
  • lowers sludge and deposit formation;
  • reduces wear of working parts;
  • does not produce harmful emissions and does not pollute the air.

Synthetics contain additives that prevent fouling and protect the powertrain from wear. Semi-synthetics are produced by mixing mineral and synthetic bases with special additives.

Advantages of synthetic and semi-synthetic motor fluids

Oil products marked SAE-30, having high viscosity and intended for summer use, are perfectly suitable for 4-stroke motors of motor-blocks, cultivators and other garden equipment. They may be mineral or synthetic based, and contain a variety of additives. Liquid with such designation reliably protects working surfaces from corrosion and fast wear. The oil is distinguished by the fact that it prolongs the life of the engine.

Summer SAE-30 can be substituted by any multigrade oil with 30 as the second digit. For example, the fluid marked 5W-30 has similar characteristics when used in summer, but it can also be used in winter, when the air temperature is not lower.35 o C. 10W-30 grease also has similar SAE-30 properties when used in warm seasons. But its operating range is limited by temperature.25 o C.

Below are described the most popular brands of summer oils labeled SAE-30, as well as oils? Designed for all-season use.


Mineral summer grease (made in Russia) that contains different additives with dispersant, antioxidative, anticorrosive properties. It forms a strong oil film that remains on the surface of the parts for a long time. Provides reliable wear protection and increases engine resistance to high mechanical loads.

Motul Garden 4T SAE30

Motul mineral lubricant with antiwear, detergent and dispersant properties. Has good temperature-resistance, does not foam. Used in four-stroke gasoline engines and diesels. Compatible with unleaded and leaded gasoline, diesel fuel.

Husqvarna SAE30

This petroleum product, produced by a Swedish company, contains additives, due to which it has an antifoulant, antiwear, anticorrosive properties. Provides stable lubrication of parts, thus helping to increase engine life. Works effectively in the plus temperature range of 5-30 oC.

Lawn Mower Oil Guide: What Type of Lawn Mower Oil Should I Use? | eReplacementParts.com

Patriot Supreme HD SAE30

High-quality American-made engine oil with mineral basis. Suitable for summertime use. They contain anti-wear and anti-corrosion additives and provide maximum engine protection under severe operating conditions. Used for lubricating power tillers, mini-tractors, brush cutters and other farm equipment.

Premium Zubr 10W-30

All-season semisynthetic liquid of the Russian brand, designed for lubrication of four-stroke gasoline and diesel engines. Increased resistance to oxidation at high temperatures, has a viscosity corresponding to the SAE 10W-30. Can be effectively used in the temperature range.25 o C 50 o C.

Premium Inforce 11-04-03

Multigrade oil on semi-synthetic base with multifunctional additives providing anticorrosive, extreme pressure and anti-wear properties. Prevents formation of soot, reduces engine noise, effectively protects its moving parts from wear. Can be used at temperatures from.20o C to 30o C.

G-MOTION 4T 10W-30

An all-season lubricant made in Germany for four-stroke engines of power tillers, cultivators, snow blowers, mini-tractors and other small equipment. High thermal-oxidative stability, good lubrication of friction parts, reduces technical wear, prevents the formation of corrosion and harmful deposits. Provides effective operation of the power plant under all operating conditions.

SKAUT 10W40 engine oil

Skaut semisynthetic oil 10W40 is one of the most popular lubricants, used for power tillers, mini tractors and other small tools. It is based on mineral, synthetic mineral oil products and is detergent, i.e. contains detergents and dispersant additives. Therefore fully complies with technical requirements. This type of grease is an all-season lubricant and can be used at temperatures from.25 o C to 40 o C without reducing its properties.

Principal differences of internal combustion systems for the user

Which combustion system is more efficient, 2 or 4 stroke? How for the user to understand and buy the best gear? Gasoline trimmers and brush cutters with 4-stroke motor on sale not found. The two-stroke is much lighter, so the grass trimmer doesn’t weigh much and can be handled by a woman. But there are also two-stroke engines on four-wheelers. Other differences:

  • Different way to use lubrication;
  • The 4-stroke motor is more environmentally friendly and less noisy;
  • 2-stroke engine is easier to repair and maintain;
  • motor life is more at 4-stroke, but they have more complicated maintenance due to oil replacement in the lawnmower;
  • two-stroke motors are lighter and cheaper.

The 2-stroke engine used in the lawnmower is inferior in many technological indicators to the 4-stroke engine. With a separate gasoline and oil supply in terms of economy and other indicators, it is preferable for light equipment. In addition, the separate fuel supply saves up to 4 times the consumption of an expensive component.

The photo shows the engine that has been running without oil change for a long time.

A four-stroke engine has a complex lubrication system, and it is all the more necessary to use ways to clean the circulating fluid. The oil system has a filter to prevent scale and other debris from clogging the tubes and pump. Replace this part when dirty.

How to Change Oil in a 4-stroke Engine

The manufacturer in the instruction manual gives a schedule of maintenance of the mechanisms and the order of work. Lubrication efficiency decreases after 50 hours of operation. That is why an oil change is required. In domestic use, you won’t get that much time in a season, and you should clean the filter and change the oil when preserving. Before changing the oil in the lawnmower, you need to increase the fluidity of the fluid, start the engine and let the system warm up.

It is necessary to unscrew the cap for filling the tank with oil and use a liquid sampler under vacuum.

To do this, make a nozzle and siphon off the waste into a prepared container. But a small part of it, up to 100 ml will remain in the crankcase and drain off the filter. Get rid of this residue by draining the fluid for about 5 minutes through the hole. At the same time in the system change or wash the filter. After pour new grease, controlling the level with a dipstick. Usually, engine oil is packaged in opaque black plastic so that it does not decompose in the light. The required volume is 500-600 ml.

The functions of engine oil in the engine of garden equipment

Structurally, such power units are much like car internal combustion engines. However, all elements here are proportionally smaller. Consequently, their service life is also lower. Lawnmower motors run at very high frequencies. The resulting friction forces are very high in many places, but because of the smaller size of the components the friction resistance is lower. Oil helps if not to completely eliminate the negative effects of friction, then at least to slow down wear and prolong the life of the engine.

New engines just off the assembly line are in top condition. All their clearances are maximally aligned, all parts work like clockwork. And if you use the right lubricating fluid and change it regularly, they will degrade at a much slower rate. And the fact is proven in practice: the higher the quality of the oil in the engine, the longer it will last.

But the oil’s function is not just limited to lubricating the surfaces in contact with each other:

The cooling efficiency of the engine as a whole and of its individual components is increased. and this again has a positive effect on the service life of machinery;

They are stable over long periods of heavy-duty operation;

rusting of internal engine surfaces is prevented. the oil forms a reliable protective film that prevents water from contacting the metal;

the combustion products that are otherwise deposited in the cylinder are flushed out, which would lead to a significant decrease in engine performance over time.

Thus, the timely oil change in the lawnmower engine directly affects its performance in the long term.

How to choose the right oil for a lawnmower, its types

Let’s start with the fact that the principle of oil movement in a normal machine engine, described above, will be different from that used in a lawnmower. To reduce the cost of the device in the production of engines for trimmers, the manufacturers remove the oil pump. the kind of grease that is optimal for cars is very different from what is used in lawn mowing equipment.

In it, the crankshaft is responsible for oil distribution. The substance itself has to be mixed with gasoline in proportions of 1 to 50. In other words, 2% of the fuel composition should be oil. Although on some lawnmowers this indicator may vary. This is the information in the manual. Even if it’s lost, you can find the right manual on the Internet. According to the chemical composition there are three types of oil:

  • Mineral is made from refined petroleum products. The substance is very viscous and is designed for a small power motor (mixing ratio with petrol is 1:32).
  • Semi-synthetic is based on mineral oil but has added artificial additives. They protect moving engine parts, reduce the risk of breakdowns and are particularly effective during the cold season. Semi-synthetic oils are great for lawn mowers. It is a middle ground between mineral and synthetic, but cheaper than the latter (1:35).
  • Synthetic fluid is created with hydrocarbon components and esters. The latter is the result of complex chemical reactions of acids. Such a complex substance justifies its composition: excellent gasoline solubility, high fluidity. Easily lubricates the engine and contains almost no ash components. Has even more additives that perform well in both warm and cold weather. This oil is an expensive option when compared to counterparts (1:50).

The API classification is designed to differentiate between motor oil and the technology that uses it. For lawn mowers can be used:

  • TA. for two-stroke engines of trimmers and mopeds with small engines (not more than 50 cm³).
  • TB for scooters and motorcycles with higher horsepower (50-200cm³).
  • TC. for motors with high oil quality requirements, excellent for grass trimmers.
  • TD. for two-stroke outboard engines, also well suited for lawn mowers.

When selecting an oil, the rule “more expensive is better” cannot be applied. Fluid should be selected only by API classification and type of oil. Always look at the 2t and 4t numbers. Marked 2T for two-stroke and 4T for four-stroke.

These oils are very different from each other, so never use a two-stroke oil for a four-stroke and vice versa. The ash that remains from burning oil will settle inside the engine. Mixed with grease during operation, forms a substance that easily injures the motor.

Which oil and gasoline to choose for filling lawn mowers with two- or four-stroke engines

LIQUI MOLY Rasenmaher-Oil 30 3991 seasonal mineral lawnmower engine oil 1L is an all-purpose product. suitable for both gasoline and diesel engines of four-stroke garden and power equipment with both air and water cooling systems. The product is recommended for use in temperatures above freezing. Using this oil guarantees high stability and durability of your aggregates.

Which oil and gasoline to choose for filling lawn mowers with a two- or four-stroke engine

The internal combustion engines used in lawn mowers come in two and four-stroke. For users need to know, the oil for lawn mowers with a 4-stroke engine is filled separately from the gasoline. For a two-stroke engine, a fuel mixture is prepared with the addition of oil. At the same time different formulations are recommended, which should not be interchanged and mixed.

Oil for four-stroke engines

For lawnmowers with four-stroke engines, lubricant must be filled into the appropriate opening in the crankcase and petrol into the appropriate tank. The owner’s manual for each ride-on lawnmower includes recommendations for lubricant change intervals. Nevertheless, it must be remembered that the effectiveness of lubrication decreases after about 50 hours of total operation of the machine. In cases where small areas need to be mowed, even in one season that many working hours may not be accumulated. This means that the lubricant needs to be changed only to preserve the machine for the cold season.

The process of changing the lubricant step by step is as follows:

  • First of all, the engine unit run for 15 minutes at idle speed in order to warm it up (in this case, the viscosity of the old substance will decrease, and its fluidity, on the contrary, will increase);
  • Then the plug of the oil hole on the crankcase is unscrewed;
  • The lawnmower itself is tilted toward this drain, having previously placed a container to collect the used lubricant;
  • After draining the used material, the plug is screwed in;
  • The machine is installed on a level base;
  • The upper crankcase opening is opened and the new lubricating substance is poured in, and its level is periodically checked with a dipstick;
  • When the level reaches the desired mark, the hole for filling tightly screwed plug (standard lubricant volume can vary from 500 to 600 milliliters).

Professionals think it is possible (and the practice justifies it) to use in four-stroke internal combustion engines not only the brands recommended by the mower manufacturer, but also their close analogues. For example, “10W40” can easily be replaced with “SAE-30. Practically any lubricant of “SF” class and higher will do for most modern mowers. During cold weather and for preservation purposes, special frost-resistant brands should be used.

Masters advise not to pour the used oil directly into the soil as it is very harmful for the environment. It is better to use special containers for collecting “waste” and dispose of it at special landfills.