How to dilute gasoline for a lawn trimmer

How much oil to put in a grass trimmer per liter of gasoline

Gasoline-powered mowers are fairly common tools used by garden and homestead owners for mowing grass and making hay. common names for tools are the terms “grass trimmer” and “lawn mower”. The main difference is hidden in the design of the motor. the expensive segment of the devices is equipped with four-stroke models, and cheap. two-stroke. The latter option has advantages, including a small weight, ease of use, as well as low cost.

The most important condition for the work of two-stroke models is the preparation of the fuel mixture, based on the manufacturer’s defined proportion of gasoline and oil. The simplified design of the motor does not provide a separate channel for lubrication, so engine oil is added directly to the gasoline. Violation of the correct proportion leads to a significant reduction in the resource of the tool and even to its failure. Let’s understand what composition is required for gasoline trimmers, how to prepare the mixture correctly and what it can affect.

The choice of gasoline for grass trimmer

For some reason everyone prefers to choose a brand of gasoline for brushcutter at its discretion. This is a wrong approach, because, first of all, it is necessary to carefully study the instruction manual, where the manufacturer’s recommendations are given for the selection of the type of fuel. But this is also not a guarantee, because unleaded fuel may be sold under different brands (which differ in many manufacturers), with significantly different composition. Therefore, it is necessary to be guided by the basic characteristics in order to choose gasoline for a particular model of grass trimmer.

Gasoline manufacturers recommend using gasoline brand AI-92, but for more expensive types will need fuel with a higher octane number. AI-95. Any brand, the marking of which appears figure 90 or less, for benzokosos not suitable, as lead to rapid wear and tear. The problem stems from unscrupulous fuel producers who sell a completely different brand under the guise of 92. The situation is as follows:

  • In the passport of gasoline equipment there is a recommendation to use gasoline with an octane number not lower than 92;
  • The conscientious owner goes to the gas station where the price is lowest and with a clear conscience fills the brushcutter with such fuel;
  • As a result, the service life is reduced, because often under the guise of AI-92 sold AI-80 and AI-76.


To avoid such a situation, you need to choose one filling station, which sells proven gasoline (this can be determined by the reviews of regular customers). It is also important where to pour fuel after purchase. only metal containers should be used for this (plastic. forbidden).

Preferably, when it is possible to buy gasoline for the grass trimmer high purity specifically for garden equipment. Then you can be sure of its quality and protection against counterfeiting.

What to choose oil to fill in the grass trimmer or types of lubricants

Grass trimmers and lawnmowers are powered by two-stroke engines, which have a simplified design. Rarely, but there are trimmer models with 4-stroke engines that run on pure gasoline. Power units of two-stroke type have no compartment for filling engine oil (oil sump), which reduces the weight of the tool and its cost. If the rotating parts of the engine are not lubricated, they will end up failing quickly. To prevent this, the grass trimmer is not filled with pure gasoline, but with a mixture of oil. What Oil to Dilute with Gasoline for Grass Trimmer?

To begin, let’s remember or find out what types of oils by chemical composition are available:

  • Mineral fluids. these are designed for low-power, air-cooled machinery. This is the cheapest type of lubricant for motors
  • Semi-synthetic substances. they are used for equipment that has air and water cooling
  • Synthetic. suitable for all types of engines with different types of cooling. They do not require frequent changes, and this type of lubricant is several times more expensive than mineral and semi-synthetic

From the above, it follows that for grass trimmer oil with any composition. mineral, synthetic and semi-synthetic. Oils with different chemical composition differs in price, so it is necessary to rely on the recommendations of the tool manufacturer when buying. The instructions include a recommendation of which oils are best to use. If it is a TC-W3 standard, then it is not so important what composition the substance should have. In this case you can dilute mineral, semi-synthetic and synthetic with gasoline.

This is interesting! The main thing when choosing an oil is not to get caught on a fake, as today you can often find different types of lubricating compositions for two-stroke engines, which consist mainly of low-quality petroleum products.

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Using a grass trimmer in the garden

In modern conditions, the purpose of the grass trimmer is to take care of the lawn and the plot as a whole. In contrast to the traditional unit for mowing the lawn, the grass trimmer has advantageous differences:

High mobility. This allows the use of the device in hard-to-reach and limited in size places.

Versatility. Depending on the type of vegetation, the working tools change, which allows you to cut grass of any height and hardness.

Simple design. With timely maintenance grass trimmer does not require regular adjustments, frequent repairs.

When choosing a trimmer for grass, analyze the conditions of use of the unit, which will help make the right choice on the type and power of the engine.

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What are the features of chain saw?

If you have a cottage or house in the countryside, you need a chainsaw. For gardening you need a chain saw for home use. It has a low power output, but it is enough to remove old tree branches, cut firewood, and cut planks. This saw does not have much weight or size. If you need to cut trees in the yard or are planning construction work, it is better to buy a semi-professional chainsaw. its working time should not exceed 8 hours a day. A professional chainsaw is very powerful and can run for up to 16 hours straight. High-strength materials are used for these saws, and use requires certain skills. Professional chainsaws are used for industrial felling and other similar jobs.

All of these types of saws differ in terms of both power and weight. If you’re not planning big, permanent jobs, you’re better off with a home chain saw, which weighs a lot less and is therefore easier to handle. Professional saws, on the other hand, are rated at up to 6 kW and therefore weigh more. The choice of such a saw depends on the thickness and strength of the material to be sawn.


Stricter criteria for choosing an oil component. In the best case, it is a mineral or semi-synthetic motor oil recommended by the manufacturer, designed for use in high-speed two-stroke engines with air cooling.

Mineral oils have the advantage of lower cost. Their more expensive semi-synthetic and synthetic equivalents have improved performance and meet more stringent environmental standards.

  • retain their properties over a wide range of operating temperatures;
  • do not form soot deposits;
  • Contains detergents, antioxidants, preservatives and other additives that are useful for power tool operation.

How to mix (dilute) gasoline and oil for 2t engines.

To summarize the above. Use for your brand equipment an oil designed or recommended by the manufacturer of that equipment. For the STIHL FS 55 brushcutter, for example, STIHL HP oil (see STIHL manual oil). Figure 1a) or STIHL HP SUPER, for the Husqvarna 128R brushcutter use Husqvarna HP oil (Figure 1b) or Husqvarna LS oil. For 2.Do not use 4-stroke motor oils on conventional combustion engines;. Do not use 4-stroke motor oils on conventional combustion engines. for example 10W30, SAE 30, etc.д.

Figure 1 a-Husqvarna oil (left), STIHL oil (right)

Useful hint

Never use 2-stroke oil intended for water-cooled engines, since these oils are designed for operation at lower temperatures.

Observe the proportions of oil and gasoline in the fuel mix specified in the instruction manual of the machine manufacturer. Chinese manufacturers most often indicate the ratio of 1 part oil to 25 parts gasoline, with STIHL and Husqvarna this proportion is 1 / 50.When you mix a small volume of oil (up to 1 liter), it is important to measure the oil in the mixture very carefully. Even small oil volume miscalculations can lead to serious mix mismatches. In such cases, you can use a syringe of medicine for accurate dosing.The fuel mixture must be prepared in a clean, specially designed container. (see Figure 3) The no-fill system has a valve that keeps fuel from spilling into the tank completely. figure 2)

Useful tip

I do not recommend to use improvised plastic bottles and canisters, as gasoline can dissolve plastics and all this “slurry” gets into a fuel tank and disables the carburetor.

Plastic canisters, designed for petrol, always have a flame symbol. It is very convenient to use a canister with a no-fill system (see Hopper Safety Data Sheet, page 10). figure 3). The no-fill system has a valve that prevents fuel from spilling when the tank is full.

Figure 3: Spill-free refueling system

What is the best oil for boat motors?

Also note that if these oils can not be used for making gasoline mixture for boat motors. 2T boat engines must be filled with a mixture of gasoline with an octane rating of at least 89 and ultrapure oil with detergent additives NMMATC-W3 in the ratio of 1:50 per operating mode, and. 1:25 for the running-in period (first 5-10 hours). The choice of quality the base of engine performance, that’s why each manufacturer recommends to fill up the equipment with certain oil brands, thereby guaranteeing the longest life of the product. So for the boat motors (both 2t and 4t) tohatus service center recommends to use german oils motul or american quicksilver. For mercury boat engines, you must use only quicksilver motor oil. For Honda boat engines, the most preferred brands are motul and statoil.

Useful tip

It is not recommended to use the fuel mixture if more than two months have passed since it was prepared.

How to dilute petrol and oil for grass trimmer

The two-stroke engines of the tool work due to the gasoline-oil mixture, which is prepared in the proportions that are specified in the technical passport of the device. If you ignore the mixing rules, your garden tool can fail quickly.

The functioning of the two-stroke unit is different from the work of four-stroke motors: the lubrication of the rubbing surfaces in the crankshaft and other parts of the device is carried out not from the crankcase, but through oil, which has been previously diluted with gasoline. For two-stroke engines there is a general rule of preparing a combustible mixture. gasoline is diluted with a certain volume of oil intended for this purpose.

How to dilute gasoline with oil for grass trimmer. step-by-step instructions

The fuel composition is mixed in special proportions.

If the fuel mix is diluted with an insufficient quantity of oil, the lawnmower is subject to heavy wear and tear

The optimal oil to gasoline ratio can be found in the trimmer manual. As a rule, it is equal to 1:50, 1:40 or 1:25.

Dilute petrol and lubricant in a suitable container first: you must not do this immediately in the fuel tank. If you ignore this rule, the work of the engine may be inconsistent, and then the tool will quickly fail. To dilute the fuel mixture, you should not use plastic canisters or bottles, because gasoline is able to dissolve this synthetic material. Order of mixing the fuel:

  • Pour one liter of gasoline into a container (ideally a metal canister).
  • Add half of the required oil proportion.
  • Mix the liquids thoroughly, away from open flames.
  • Pour the rest of the lubricant into the container and mix the mixture again.
  • Pour the fuel into the fuel tank of the grass trimmer.

Wear a respirator and rubber gloves when carrying out the work. You can use a watering can for easy pouring. Do not hold the fuel mix for more than 3 months, but make sure you mix only as much fuel as you need for the work you are planning to do in the near future. Be sure to choose high-quality oil for mixing with gasoline, it is better to buy it at proven gas stations.

Oils and fuel ratios

Calculation of the ratio of ingredients for preparing dressing for grass trimmer should take into account the recommendations on the oil package. The standard ratio is 1:50. Use any quality oil for two-stroke motors allowed.


It remains to choose what gasoline to fill in the trimmer for grass. The choice is not great. AI-92 and AI-95. The difference between them is quite significant. If the manufacturer’s instructions do not specify what gasoline to use, it is necessary to stop at AI-92. It almost does not depend on the brand of gasoline, how much oil to add per liter of gasoline, if the fuel is of high quality and fully complies with the declared brand. Buy gasoline only at branded gas stations, where the risk of buying A-80 instead of AI-92 is almost zero.

If recommended to fill the fuel AI-95, do not use other brands of gasoline. If the engine starts, it will run erratically and overheat quickly. So you run the risk of damaging the motor not only the domestic trimmer for grass, but also the professional.

Learning how to dilute gasoline with oil for grass trimmer if you under or overfill the oil

If you have bought a grass trimmer, lawnmower, brush cutter, chainsaw and other types of equipment, you probably know that they use two-stroke motors as power units. These engines do not run on pure gasoline, as four-stroke engines do, but on a mixture of gasoline and oil. In what proportion should you dilute gasoline with oil for a grass trimmer. this is the question every dacha owner asks himself before preparing the tool to work. Let’s understand this question in detail, as the dilution of gasoline with oil for trimmer for grass affects the service life of the tool, and improper preparation of the mixture, will lead to rapid wear of the engine. How dangerous is the excessive or insufficient amount of oil in gasoline for grass trimmer:

  • If the gasoline is diluted with a lot of oil (above the norm), it will not only lead to a lot of smoke, but also to the formation of soot on the cylinder walls and a drop in power.This soot will cause wear of the piston, which will be diagnosed by a decrease in its performance
  • If the gasoline contains insufficient oil in the grass trimmer, this is even more dangerous.After all, the working mechanisms of the engine will not be lubricated in sufficient quantity, which will eventually lead to their rapid wear (there is a rapid destruction of the piston rings and jamming of the motor). With insufficient oil in the gasoline poured into the trimmer for grass, the wear and tear of the motor will occur ten times faster

To avoid having to pay for mistakes at the cost of an engine overhaul or the purchase of a new tool, you need to fill the tank with fuel of the correct consistency from day one. You can find out the ratio in the instruction manual of the tool, because the models of different manufacturers may give different recommendations. Usually this ratio is as follows:

  • 1 to 25 or 40 grams of two-stroke oil per 1 liter of gasoline
  • 1 to 40, or 25-30 grams of oil for 1 liter of petrol
  • 1 to 50. this is 20 grams of oil added to a liter of gasoline

The standard ratio is 1:50 (it is specified on the canisters of oil for two-stroke engines), but you have to rely on it as a last resort, because the manufacturers indicate the recommended ratio, and if you don’t follow it, the service life of the two-stroke engine will be reduced.

In addition to observing the proportion, it is also necessary to learn how to prepare the mixture. In fact, the variant of oil refilling in the gas tank is categorically contraindicated, though some people do so. If you bought a grass trimmer or lawnmower, you’ll need the consumables you’ll use to make the mixture. Instructions for preparing the fuel mixture in the grass trimmer is as follows:

  • Prepare gasoline and two-stroke oil, based on the above recommendations on the choice of lubricant and fuel
  • In addition for the preparation of the mixture you need to take a container or container. Usually a plastic bottle is used for this purpose, which you need to choose accordingly. It must be clean on the inside. Do not use a milk, beer or other beverage container. A mineral water bottle is the best choice
  • It is very important that the container has a whole value of volume, that is 1 or 2 liters, so you don’t have to calculate how much oil to pour in a bottle of 1.5 liter, 1.3 or 1.25 liter, because you could easily make a mistake
  • You also need a syringe, which is used as a measuring device for dosing the oil. An ordinary medical syringe of 10cc or more is suitable for such purposes. It is desirable that the syringe had an accurate measuring scale
  • After preparing the necessary materials, you can proceed to the preparation of

Instructions for the preparation of the fuel mixture into the lawnmower:

    First, you should fill a plastic container. The container is filled with 2 fingers are not full, so that the oil will fit

After preparing the fuel mixture for the grass trimmer, it remains to fill up the tool, and get to work. How to properly fuel grass trimmers, lawnmowers, chainsaws and other types of motor equipment, we will consider in detail.

ДOnly fresh gasoline is used for dilution and use in the trimmer.

How to mix oil with gasoline for a two-stroke engine

The peculiarity of work of two-stroke engines is that the fuel is filled into the tank together with oil. Each refueling before operating the equipment requires the preparation of the fuel mixture with observance of the proportions. How to do it right? From our article you will learn how to dilute gasoline for chainsaws, grass trimmers and other garden tools.

To run your gardening equipment, it is recommended to buy unleaded gasoline. Otherwise there is a risk of engine failure. Manufacturers recommend a fuel octane rating of AI-90 or higher, preferably AI-92 or AI-95. Consult the instruction manual for your tool to determine the proper oil for your particular application. At the filling station, pour the required amount of fuel into the canister. It is preferable to use metal containers: they do not create static electricity from friction and so increase operational safety.

Always buy brand name oils for two-stroke engines, preferably API-TB or API-TC. The manufacturer should state which brand(s) you recommend in the owner’s manual. Also consider their composition. Mineral oils are suitable for use in warm weather. Synthetic is better, it is less viscous and can be used even in freezing temperatures. Semi-synthetic are mineral with improved qualities, universal for any season. Check the oil’s temperature rating on the package. Also note the volume. What matters is not the proportion of gasoline and chain saw oil, but how much fuel mixture you need for one filling and how often you will work with the tool. If you have in your arsenal in addition to the saw another trimmer for the grass or gasoline shears and you use one or the other tool several times a week, it makes sense to buy a large canister of oil with a volume of 3. 5 liters. For several mowing during the garden season, it is enough to take a bottle of 1 liter.

Mixing oil with petrol

When you start working with a tool, the question always arises how much oil to add to gasoline for a chainsaw or grass trimmer. It is important to remember that for two-stroke engines the ratio is 1:50, t.е. 100 ml of oil per 5 liters of fuel. Why it is important to observe the proportions? Excess oil contributes to carbon deposits on pistons and spark plugs, and its deficiency worsens the lubricating properties of the fuel mixture, which leads to scuffing of the piston group and increases the risk of engine failure.

The easiest way to determine petrol and oil ratios for chain saws is to use measuring jugs. They have a scale with marks on them, which is easy to navigate. Before pouring gasoline and oil into the tank, be sure it is clean. Do not allow water and dirt to get inside. this will affect the quality of the fuel mixture. First fill petrol to the proper level, then add oil to the proper level. To mix them, tilt the container several times. The fluids will mix quickly and the mixture will take on a uniform color, such as green or red (depending on the oil composition).

Important to know! Never use plastic drink bottles for storing and mixing fuel mixture. Gasoline corrodes plastic. Even if the walls of the bottle seem to be intact, harmful components will get into the fuel mixture, and together with it into the engine. This is very bad for the carburetor.

We recommend wearing gloves to protect your hands from gasoline and oil. Also remember the elementary rules of fire safety. Mix liquids outdoors so gasoline fumes do not accumulate indoors. Do not smoke while working and avoid other factors which can cause inflammation of combustible and lubricating materials.

If you have made more than you can use at one time, pour the mixture into a separate canister for storage or leave the mixture in the mixing container. If you have made more mixture than you can use at one time, empty it into a separate canister for storage or leave it in the mixing tank. The main thing is to close the cap tightly. The ready mix can be stored for two weeks and used for refueling without risk to the engine. The only condition. do not leave it in the fuel tank. If the tool will not be used for an extended period of time. use up the residue completely or drain it off.

Now you know how to dilute gasoline for a chainsaw so as not to harm the engine. Try doing it yourself. After you’ve mixed your fuel a few times you know how much you need, so you don’t leave any extra mix. Buy everything you need in our online store. Lots of life with our genuine Husqvarna oils.

Husqvarna oils

Lubricants extend engine and indirect parts’ life and provide long, trouble-free operation.

Husqvarna all-season oil. one of the best for garden and construction equipment. Protects the engine immediately at startup and instantly lubricates faraway parts. Has a soft texture, anti-corrosive properties, works over a wide temperature range and at high speeds.

Husqvarna oils advantages

  • suitable for use of low-quality gasoline;
  • Help you save fuel;
  • The thick film of oil protects the engine from wear and corrosion;
  • reduce the appearance of carbon deposits on pistons and cylinders;
  • Due to its high viscosity the oil is easy to get to the parts that rub;
  • Special admixtures prevent deposits on the crankcase;
  • low maintenance costs;
  • Low volatility, resistance to oxidation processes;
  • Environmentally friendly and biodegradable components.

Engine oils for 2 and 4-stroke engines

  • snow blowers;
  • biodegradability of components in chain saws and chain saws;
  • lawnmowers;
  • trimmers;
  • blowers;
  • power tillers;
  • garden tractors; etc.

Summer oils and all-purpose variants for all-year-round use are available.

Husqvarna 2-stroke HP HP oil 1 liter API SG. the sales leader in Russia. Its advanced formula is adapted for use in severe latitudes of Russia with poor-quality gasoline. Synthetic additives protect the engine from wear, deposits and corrosion, suitable for all 2-stroke machines.

Pay attention! How to tell the difference between Husqvarna oil and counterfeit:

  • HP two-stroke oil is sold in 1 liter volume only, price from 799 p.
  • Black or yellow laser engraving on the top of the bottle.
  • On the side of the bottle there is an oil level indicator stripe, notched at 100 ml.
  • Date of manufacture includes not only day-month-year, but also time of manufacture.
  • Instructions on the back completely in Russian. There is information on certification, precautions, storage conditions, manufacturing plant and importer in
  • In addition to the logo and barcode, the type number # 5878085-12 is printed.
  • Marking “Made in Sweden”, no other official manufacturer.
  • Dial on the bottom of the bottle: the year is indicated in the center of the circle and the arrow points to the month.
  • Test ring for opening, engraved H (Husqvarna) logo on cap, with protective aluminum foil underneath.

Husqvarna chain oils

To prevent wear, a special low-viscosity oil is used to lubricate the chain and protect the saw bar. Effective in cold and humid conditions. Easy to wash off with soap and detergents.

Oil for air filter

Impregnates the filter and collects dust particles before they get into the engine, thereby increasing its life and durability. Removes with soap, biodegradable.

See the complete catalog of engine oils in our catalog of engine oils in our Husqvarna store.

  • Free same day delivery in Moscow.
  • Self-delivery. Moscow. Moscow, metro station Tulskaya, ul. Pavlovskaya 27/29.
  • Sending by transport company to any region

To buy Husqvarna oil, place your order online or call if you want to consult a specialist.

Choosing lawnmower oil

For trimmer engines choose the “2T” oils, which are used for air-cooled engines with displacement from 50 to 200 cm3. In the first place when buying oil, you should pay attention not to the price, but the protective properties of the material, because a small savings can later become a real headache for the owner and, as a rule, a big expense.

Two-stroke lawnmower oil

The main factor determining the quality of grass trimmer oil is the alkalinity number. This component in particular prevents oxidation of moving parts and slows down their breakdown. During use, the oil gradually loses its alkalinity and becomes oxidized. The optimum level of acidity (Ph) should not be less than 8-9 units.

The oil viscosity for the brushcutter also has a great impact on the process of operation of the gasoline tool. This parameter determines the ability to operate the grass trimmer at different temperatures. Summer oils, for example, thicken even when the temperature drops a little. In view of the use of lawnmowers exclusively in the spring and autumn period, an excellent option would be an oil with summer markings.

The flash point of grass trimmer oil must be more than 225C, otherwise the oil will burn out quickly, and the piston group will be subjected to intensive wear and tear.

What to look for when choosing oil?

Modern brushcutter two-stroke engines are filled with a mix of AI-92 gasoline and 2T oil. The use of fuel with a higher octane number will increase the flash point and, consequently, the burnout of the lubricant.

STIHL oil varieties

Undoubtedly, the best oil for trimmer for grass is recommended by the manufacturer, but the owner is not always able to buy just a “company” lubricant. The experts recommend Shell Helix Ultra, based on Pureplus technology, which improves the basic properties of the lubricant.

STIHL HP Ultra, STIHL HP, STIHL HP S. the base oils for STIHL gasoline trimmers. A budget substitute can be products of the company Vityaz, which by its properties is the most similar to the recommended material.