How much to dilute oil with gasoline for grass trimmer

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

Gasoline 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 “lawnmower”. The main difference lies in the design of the motor. the expensive segment of the device is equipped with four-stroke models, and the cheap. two-stroke. The latter option has advantages, including low weight, ease of use, and 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. The violation of the correct proportions leads to a significant reduction in the resource tool and even to its failure. Let’s understand what composition is required for gasoline trimmers, how to properly prepare the mixture and what it can affect.

The choice of gasoline for grass trimmer

For some reason everyone prefers to choose the brand of gasoline for brushcutter at its discretion. This is an erroneous 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 it is not a guarantee either, as unleaded fuel can be sold under different brands (which differ in many manufacturers), with significantly different composition. Therefore, it is necessary to be guided by the main characteristics in order to choose gasoline for a particular model of grass trimmer.

Manufacturers of gasoline tool 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 includes the number 90 or less, is not suitable for benzosokos, because lead to rapid wear and tear. The problem is due to unscrupulous fuel producers who sell a completely different brand under the guise of 92. The situation is as follows:

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

Filling up with fuel

To avoid such a situation, you need to choose a filling station, which sells proven gasoline (it can be determined by the reviews of regular customers). It is also important where to fill up the fuel after buying. only metal containers should be used (plastic is prohibited).

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

What to choose oil to fill a 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 do not have a compartment for filling the engine oil (oil sump), due to which the weight of the tool is reduced and its cost is reduced. If the rotating parts of the motor are not lubricated, they will end up failing quickly. To avoid this, the grass trimmer is not filled with pure gasoline, but a mixture with oil. What oil to dilute with gasoline for grass trimmer?

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

  • Mineral fluids. 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 motors with different types of cooling. They do not require frequent replacement, and this type of lubricant is several times more expensive than mineral and semi-synthetic

From the above it follows that the grass trimmer is suitable for any oil composition. mineral, synthetic and semi-synthetic. Oils with different chemical compositions differ in price, so when buying should be based on the recommendations of the manufacturer of the tool. The instructions indicate advisory information about what types of oils are best to use. If it is a TC-W3 standard, then the composition of the substance is not so important. 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 in a fake, as today you can very often meet different types of lubricating compositions for two-stroke motors, which consist mainly of low-quality petroleum products.

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Using the grass trimmer in the garden

In modern conditions, the purpose of the grass trimmer is to care for the lawn and the plot as a whole. Unlike a traditional lawn mowing machine, the grass trimmer has profitable differences:

High mobility. This allows you to use 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 operating conditions 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 a chainsaw?

If you have a holiday home or a cottage in the countryside, you need a chainsaw. For gardening needs a chainsaw is enough. Its power is low, but it is enough to remove old tree branches, cut firewood and boards. This saw is not very heavy or large. If you need to cut trees on the site or you are planning construction work, it is better to buy a semi-professional chainsaw. It must not work for more than 8 hours a day. A professional chainsaw is very powerful and can run for up to 16 hours straight. They are made of high-strength materials and their use requires a certain amount of skill. Professional chainsaws are used when felling wood on an industrial scale and for other similar jobs.

All of these saws differ in both power and weight. Unless you plan on doing a lot of felling on a regular basis, it’s better to use a chain saw, which weighs much less and is therefore easier to handle. Professional saws, on the other hand, have up to 6 kW power and are correspondingly heavier. Which chainsaw is right for you depends on the thickness and toughness of the material you’re cutting.


Stricter criteria for choosing an oil-based component. At best, it is a mineral or semi-synthetic engine oil recommended by the manufacturer, designed to work in high-speed two-stroke engines with air cooling.

The advantage of mineral oils is in their lower cost. Their more expensive semi-synthetic and synthetic analogues compare favorably with improved performance and compliance with environmental standards.

  • retain their operating characteristics within a wide temperature range
  • do not form sludge;
  • contain in their composition detergents, antioxidants, preservatives and other additives useful for the work of the power unit.

How to Dilute Gasoline with Oil for Grass Trimmer for Fueling

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, garden tools can quickly fail.

Two-stroke engines function differently from four-stroke engines: the lubrication of friction surfaces in the crankshaft and other parts of the unit is not from the crankcase, but through oil that has been previously diluted with gasoline. For two-stroke types of engines, the general rule of preparing a combustible mixture applies. 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 mixture is mixed in special proportions.

If you dilute the fuel mixture with an insufficient amount of lubricant, it will lead to rapid wear of lawnmower parts

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

Dilute gasoline with a lubricant component must first be in a suitable container: doing it immediately in the fuel tank is prohibited. If this rule is ignored, engine operation can be inconsistent, as a result of which the tool will quickly fail. To dilute the fuel mixture, do not use plastic canisters or bottles, because gasoline is able to dissolve this synthetic material. The order of mixing the fuel:

  • Pour a liter of gasoline into a container (optimally. 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 stir the mixture again.
  • Pour fuel into the fuel tank of the grass trimmer.

The work should be performed wearing a respirator and rubber gloves. You may use a watering can for easy pouring. The ready mixture should not be kept longer than 3 months, it is better to dilute exactly as much fuel as you need for the planned work in the nearest future. Always choose a quality oil for mixing with gasoline, buy it better at the certified gas stations.

Oils and fuel proportions

Calculation of the ratio of ingredients for preparing dressing for grass trimmer should take into account the recommendations on the package from the oil. Standard ratio is 1:50. You can use any quality oil for two-stroke engines.

We deal with the choice of gasoline for a lawnmower AI-92 or AI-95

As many people as there are opinions, which applies not only to the choice of trimmer oil for grass, but also gasoline. Similarly, in order not to make a mistake with the choice, it is recommended to use gasoline of the brand recommended by the manufacturer (indicated in the manual to the tool). However, it is not that simple, as each gas station gasoline brand names are the same, but have a completely different composition. It is required to understand, and come to a single conclusion about what brand better to pour gasoline in a two-stroke motor for your trimmer for grass.

Manufacturers recommend using A-92 gasoline for their equipment, while some models require A-95, which does not contain ethanol. It is not recommended to use gasoline AI-90 or lower, as they will lead to rapid deterioration of the engine parts. Buying gasoline of one brand, you can not be 100 percent sure that it corresponds to reality. As a result, we get the following picture:

  • The manufacturer recommends filling the grass trimmer fuel brand AI-92
  • The gardener only uses gasoline of this brand, but buys it at gas stations where the price is lower or where it should
  • This negatively affects the internal parts of the motor, as at one gas station. it is really high quality gasoline AI-92, and at the second. at best if it is AI-80, not AI-76

As a result, the engine suffers, and after a couple of years of operation of the new trimmer for grass is the need for overhaul. To not have to analyze the quality of fuel or buy only expensive gasoline, it is recommended to fill only one gas station. Gasoline cans are only filled in metal cans at the gas station, not plastic cans.

There are manufacturers that produce special purified fuel for two-stroke engines. If you choose this option, then you do not need to choose the best filling station, brand of gasoline and control its storage time.

Conclusion on the choice of gasoline for grass trimmer!

In the trimmer for grass to fill the gasoline of the brand that is recommended by the manufacturer. If you fill the tank trimmer for grass to fill gasoline A-95, instead of A-92 (which is recommended by the manufacturer), then the engine will warm up faster and work unstably. It is also better to choose gasoline A-92 Ekto, which has improved characteristics in terms of environmental friendliness.


It remains to choose what gasoline to pour into the trimmer for grass. The choice is small. AI-92 and AI-95. The difference between the two is quite significant. If the manufacturer’s instructions do not specify what gasoline to use, it is necessary to stop at AI-92. The brand of gasoline has almost no influence on how much oil to add per liter of gasoline, as long as the fuel is of good 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 it is recommended to fill in AI-95, then do not use other brands of gasoline. If the engine starts, it will work irregularly and overheat quickly. So you risk to put out of operation the motor not only domestic trimmer for grass, but also professional.

Oil for brushcutters. how to choose, in what proportions to dilute

Many of you have in the household gasoline power tools, for example, in a private home does not do without a chainsaw. You know, making firewood for the winter, comes in handy at construction and repair, and in general, it is a very useful tool. If your country house also has a decent-sized plot, then the weed wrestling just need a trimmer or lawn mower, which also run on gasoline.

Of course, you can buy them electric, but not everyone likes to pull a 30-meter extension cord to mow a knee-deep grass area. That’s why most people prefer to work with gasoline-powered tools. As you know, you need to add a special oil for two-stroke engines. Here we are going to talk about it, because it is a very important aspect, if you do not add oil and add in wrong proportions, then your engine very quickly “will fail” and your way will be to the service center. To avoid all these troubles, add only quality oil in the right proportions.

The most popular for chain saws, brush cutters and trimmers are products of the famous company STIHL. It comes in two packages. 1 liter and 100 ml. For those who work a lot, a liter bottle is good, and a small bottle is enough for “one time sawing”. 1 liter costs 250, and 10 ml costs 60. If you take a big one, the savings are obvious.

The oil is added to gasoline in the ratio of 1 to 50, that is, for example, for 5 liters of gasoline add 100 ml. As you can see, a small bottle is great for getting 5 gallons of gasoline mix for your chain saw or weed trimmer. The large bottle has special markings on the side that you can use to tell how much oil you’ve poured out of the bottle. If you have bought a large 1 liter bottle, buy a 20 ml syringe at your local drugstore. Very convenient. 1 syringe of oil per 1 liter of gasoline.

Experts advise to use brand oil for their equipment, it is ideal because it is designed and tested specifically on STIHL tools. Note that Stihl has its own brands, such as VIKING (popular models of gasoline trimmers). Use Stihl oil for them as well and you won’t have any problems at all.

If you put more gasoline mixture than you can use, it is best to store the leftovers in a metal canister or in a glass container. Never store the mixture in a plastic bottle. Of course, if you use up the leftovers in a couple of days, you can pour the rest of the mixture into a plastic container, but if the mixture will be stored for a long time, then either a canister or a glass container. The whole point is that the gasoline mixture corrodes the plastic bottle, there are microscopic deposits of plastic in the mixture and this is very bad for the engine. Keep that in mind if you want your tool to run long and trouble free.

The second most popular oil brand is the notorious Hooksvarna. Of course, when you put it this way, more people use STIHL chain saws, at least all my friends and their friends use them only in their work.

However, there are those who cherish Husqvarna tools and I understand them, because I personally do not see much difference between a Husqvarna and a Stihl, both tools are of very high quality. But I have seen happy owners of Husqvarna chainsaws. they say the saws are great. I’ve never sawed myself but I always listen to what people have to say. So, if you have a Husqvarna gasoline tool, it would be better to use a special brand oil for it. Although, nothing terrible will happen if you dilute the gasoline Stihl. But since the manufacturer recommends using only its products, then we do so.

You can find the liter containers on the market. Black stylish bottle, you can see the same markings on the side as Stihl has (to know how much oil you have poured out of the bottle). Seems to me absolutely identical in quality. It is worth such a bottle of 270, a little bit more expensive.

Both are quality oils, cost about the same, each is diluted 1 to 50. So feel free to buy any oil, of course, it’s better to use the brand of oil that you have the tool. then everything will be perfect, just like the manufacturer advises. Have a good time sawing, mowing the grass and may your petrol tool work for a long time without breakdowns.

On a side note: the submersible pump “Aquarius 3”. my review.

Types of motor oils and their function

Choosing gasoline trimmer oil

Engine oil for gasoline grass trimmer is a lubricant that serves to reduce wear and tear between the rubbing parts of the engine.

The oil composition includes residual hydrocarbons and various additives that improve the properties of the final product. To ensure the long-lasting and trouble-free operation of the lawnmower, experts recommend using oils, which by their physical and chemical properties correspond to this type of motor.

Today it is accepted to distinguish three main types of oils by the method of their production:

  • Mineral, created in the process of distillation of hydrocarbons;
  • Synthetic oils, obtained by processing natural gas or by synthesis;
  • Semi-synthetic, which includes an improved mineral oil with some synthetic components added.

In order to prevent mixing of different types the manufacturer adds a dye to the oils, which indicates the difference in compositions of the lubricant.

Preparation of fuel mixture

Two-stroke engines run on a gasoline/oil mixture. The primary cause of malfunction is incorrectly mixed fuel or no oil in the gasoline mix. To prepare the fuel mixture you need a special oil for two-stroke engines that is labelled “For gardening equipment”. Do not use oil for boat engines, motorcycles, etc. Gasoline/oil ratio may vary depending on engine model, oil grade, and power tool manufacturer’s recommendations. A 50:1, 32:1 or 24:1 mixture ratio is used for two-stroke engines.

Under conditions of insufficient lubrication or when running on pure gasoline the engine can run for quite a long time. A characteristic sign of prolonged use of pure gasoline is increased vibration and an irregular engine sound. Slight scoring on the piston and cylinder along the entire lateral surface height. The piston ring may be destroyed.

Lack of lubrication causes transfer of metal from the piston to the cylinder walls and engine seizure.

Excessive amount of oil in the fuel mixture leads to coking of the piston ring and formation of intensive soot on the piston.

Continuous operation of the engine with the carburettor choke closed may also cause intensive sooting of the piston.

Also a sign of engine operation with excessive amount of oil in the fuel mixture is the presence of sludge on the spark plug and heavy coking of the muffler screen, which is manifested by the loss of engine power during operation.

Let’s look at some indications that the user has not followed the Operator’s Manual recommendations regarding improper fuel use and lawnmower storage.

If dirty gasoline is used to make the fuel mixture, there will be a dirty deposit in the carburetor.

The fuel filter in the fuel tank is also a sign that dirty fuel is being used.

Accidental storage of lawn mower with fuel for a long time means oxidation of carburetor carburetor elements. If the fuel filter is dirty, change the elastic properties of the rubber diaphragm of the fuel adjustment system and the diaphragm of the gasoline pump. There can also be a presence of tarred deposits on the carburetor elements.

Petrol tool manufacturers recommend the following proportions when preparing the fuel mix:

Use oil that is labeled “For Gardening Equipment”. Do not use oil for boat engines, motorcycles, etc.д.

Use clean, fresh, unleaded gasoline with a minimum octane rating of 92.

Strictly follow the gasoline and oil blend instructions. Use a special container to mix gasoline and oil. Do not mix gasoline and oil directly into the fuel tank.

Do not use a mixture that has been in storage for more than 30 days.

Before storing for an extended time:. Drain fuel from fuel tank;. Run engine until fuel is depleted;. Remove spark plug, pour 30 ml of quality 2-stroke or 4-stroke oil into cylinder; pull starter handle to evenly distribute oil inside engine, and replace spark plug.Before starting an engine after a long period of storage, remove the spark plug and drain the oil from the cylinder.

How to Mix (Dilute) Gasoline and Oil for 2T Engines.

To summarize, see the above. Use for your brand-name equipment the oil designed or recommended by the equipment manufacturer. For example, for the STIHL FS 55 brushcutter, use STIHL HP oil (see Figure 1b). 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 engine oils. such as 10W30, SAE 30, etc.д.

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

Useful tip

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

The engine oil and gasoline proportions for the fuel mixer must be in accordance with the manufacturer’s instructions. Chinese manufacturers most often indicate the ratio of 1 part oil to 25 parts gasoline, and STIHL and Husqvarna specifies the ratio as 1:50.When preparing a small volume of mixture (up to 1 liter), it is very important to carefully measure the amount of oil included in the mixture. Even small miscalculations in the amount of oil can lead to serious inconsistencies in the mixture. In these cases you can use a medicine syringe for accurate dispensing.The fuel mixture must be prepared in a clean, approved container. (see “What’s the best oil for your motorbike? Figure 2)

Useful tip

I do not recommend use of improvised plastic bottles and canisters since gasoline can dissolve plastics and all this “slurry” gets into the fuel tank and causes failure of carburetor.

Plastic canisters designed for gasoline are always marked with a “flame” sign. It is very handy to use a canister with a no-fill system (see Hopper Safety Data Sheet, page 28). 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 engines?

Also note that if these oils cannot be used to make gasoline mixture for boat engines. 2T motor units shall be filled with petrol mix of at least 89 octane number with high-purity detergent oil grade NMMATC-W3 in proportion of 1:50 for run-in operation and 1:25 for break-in operation. 1:25 for running-in operation (first 5-10 hours). Choosing a quality the basis of engine operation, that is why each manufacturer recommends to fill up the equipment with certain oil brands, thus guaranteeing the longest service life of the product. So for the boat motors (both 2t and 4t) tohatus service center recommends to use german motul or american quicksilver oils. For mercury outboard engines it is necessary to use only quicksilver motor oil. For Honda boat motors the most preferable brands are motul and statoil.

Useful tip

It is not recommended to use the fuel mixture if more than two months have passed from the moment of its preparation.