How much oil to put in your STIHL chain saw

STIHL chain saw oil and petrol ratios: types of oil, choice of petrol and the right mix

Many users of gasoline tools treat the preparation of the fuel mixture rather irresponsibly. For example, I have met saw owners who dilute gasoline with oil “by eye”. They would just pour as much as they wanted and then come to me with faulty tools.

It is important to understand that more, like less, does not mean better. It’s the golden mean that counts.

If you make an oil deficient mixture, it makes sense. Not enough lubricant in the cylinder and bearings, so more friction, higher temperatures, scoring in the cylinder and possibly seizure in the crankshaft bearings.

What happens if you overfill?? The large volume of oil, when burned, produces many residual products of combustion that deposit on the piston, cylinder exhaust window and muffler, hindering the movement of exhaust gases. As a result, a drop in power or a complete loss of performance.

The soot which is formed by an excessive proportion of oil can deposit under the compression rings, not allowing them to compensate for the thermal expansion, which will entail scuffing, in general, the consequences can be quite serious.

Lubrication system design

Depending on the brand of chainsaw, the details of the lubrication system may vary slightly structurally, but their total number and connection scheme remains the same. The main constituent parts of the lubrication system, are:

    oil tank usually located in the engine crankcase.

How much oil do I need for 1 liter of gasoline for my chain saw??

92-Gasoline and special oil for air-cooled two-stroke engines. Prepare mixture in proportion of oil and petrol. 1:40. In other words: 1 liter of gasoline. 25 grams of oil.

Oil proportion

ProportionRatio of mixtureGasoline, [liters]Oil, [milliliters]
1:50 10 л. 200 ml.
1:50 25 л. 500 ml.
1:50 50 л. 1000 ml.

How to dilute oil with gasoline for two-stroke engines?

These are stated as ratios. 1:50, 1:40, 1:25 and so on. Any of these proportions tells you how much oil to pour per volume of fuel. For example, to prepare a 1:25 mixture, you need 1 liter of oil for 25 liters of gasoline.

Running-in dressing

During the running-in period, all the rotating and mating parts and engine components are lapped. There may be excessive friction in places that can be ameliorated with additional lubrication.

The manuals for most models and brands do not give specific instructions on the amount of oil for the running-in period. But many experts with many years of experience recommend pouring 20% more when running-in.

For instance, if you have a specific chain saw with a ratio of 1:50 (20 ml for 1 liter), you should add another 20 percent, i.e. one-fifth of it, 4 ml. As a rule of thumb, you should fill up to 24 ml per liter.

The break-in period is about 10 hours for the engine. During this time, a little excess oil will not do any harm. But the new chain will run in more gentle conditions and may increase the engine’s service life in the long term.

The consequences of wrong dosage

Many chainsaw users don’t pay enough attention to the mix ratio. 50 grams more or less. it doesn’t matter? And in vain: using wrongly mixed fuel is often the cause of the chain saw’s troubles. It is possible to go wrong or wilfully go wrong in both directions.

If there is a lot of oil.

There is an opinion among chainsaw owners that “you can’t ruin an engine with oil”. But it is not for nothing that the necessary parameters of the ready mixture are invented. Too much oil can also be harmful and inconvenient. In spite of improved combustibility without residue, some of hydrocarbons still get converted into soot and soot. They are not many at a low dosage, but if you enrich the mixture with oil twice as much against the norm, you get coking. This is especially dangerous for cheap mineral oils, which do not have a “flushing” effect.

Also with a high degree of probability you will find oil in the air filter if you overfill the carburetor. The spark plugs will also be soiled and need to be cleaned, flushed and dried. Also, the under-burned oil vapors will settle in the muffler, and burn out with heavy operation, forming a plume of soot and sparks.

After such refueling almost all the insides of the saw will have to be thoroughly cleaned and flushed. The most cheerful “surprise” will be “dying” of piston rings. but this is in case of systematic abuse of oil overflow and operation under high load.

or not enough

“Greed in preparing the fuel mixture has killed many pistons. That’s where it’s really better to “overdo it” than underdo it. If in the first case you will have to have a thorough “washing” of the machine, in the second case you will have to change the cylinder block, and it is not profitable for many saws and costs a pretty penny for others.Conclusion: saving money is pointless. If you don’t have enough oil, the piston will rub against the cylinder, because at high temperatures, gasoline is too fluid to perform the function of lubrication.

Tragic results: scuffing on the piston, a ruined saw engine. If the owner gets his bearings in time, he will find that the piston and cylinder turn a beautiful blue. No master can guarantee how long these will last.

What gasoline do you need for your weed trimmer and how much oil to use??

Gasoline is 92. Oil change for a Makita lawnmower. And the oil proportion is written on the oil container and is based on its viscosity. In most cases, it is 1 to 50 (20 grams of oil per liter of gasoline).

I’m not very well versed in such things, only know that the brand of gasoline is depending on the type of trimmer for grass (in other words, in the annotation indicated what brand of gasoline needed and how much oil you need), but here I found a site and forum, which has for you the necessary data.

We have a grass trimmer. Usually he takes a dural canister and goes to get 92 gasoline. How much oil to pour must be written in the annotation to the trimmer, or on the trimmer itself. Look closely at the grass trimmer you have. There should be numbers 1:50, 1:40,1:20. This is the ratio of oil to gasoline.

You need 92 gasoline for your grass trimmer, but Ai-95 is better. Changing the oil in the engine of a VIKING lawn mower. It says it best in the datasheet. If you don’t have one, there must be a note on the tank saying how much oil to pour. Changing the line trimmer for grass Huter. There is a rule that it is better to overfill than underfill. 1:20 here and there, but other trimmers have 1:40. Moto grass mowers gasoline lawn mowers. Look closely at your own grass trimmer.

Each brand of grass trimmer needs a mixture of gasoline and motor oil in a certain proportion. It is usually stated in the annotation what ratio would be good. Some manufacturers, like STIHL, for example, produce a ready-to-use fuel mixture for their.

How to prepare the fuel mix for two strokes engines

The video shows how to make the fuel mix for two stroke engines. Electronic grass trimmers Hyundai. Fueling a brushcutter, chain saw and.

How to dilute gasoline (AI 92) for grass trimmer and lawn mower

How to dilute gasoline (AI 92) for grass trimmer, grass trimmer

For grass trimmer requires 92oy usually gasoline, not heard of that fill another, to be honest. Here’s how much? Look closely at your grass trimmer, it should have the oil to gasoline ratio written on it. these numbers may look like 1:50 or 1:20.

Gasoline should fill that brand, which is specified in the trimmer for grass usually is gasoline AI 92. AI 95. Add oil in the ratio of 50 ml per liter of petrol, special for two-stroke engines. of oil

You can fill up with either 92 or 95 gasoline. Changing the line of a Makita 3501 grass trimmer. Oil change in a Oleo-Mac lawnmower. A so how much oil to pour it is necessary to look in the instruction manual to your trimmer or look for the inscription on the body of the “bull. If you can’t find it, dilute in a 1:40 ratio. It is better to overfill a little than underfill.

Gasoline for grass trimmer is usually used either ninety second or ninety fifth. Regarding the proportion of can not say. you need to read the information on the package instructions, because it (the proportion) depends on many factors.

There are all kinds of mowers. I fill my mower with 92 gasoline. The proportion for five liters of gasoline is 200 milliliters of oil. And you can pour that mixture as much as you can fit into the tank. You should not be stingy with oil.

The engine in a trimmer and a regular chain saw is almost the same. All pour 92 gasoline (check with the manufacturer about yours, but I have not yet encountered other types of fuel). Electric grass mowers and trimmers. But how much oil. it already depends on the oil itself (read the label). I usually dilute 100 grams of oil in 5 liters of gasoline. this amount of gasoline is enough to mow a plot of 9 acres. And remember, gasoline diluted with oil can not be stored for a long time.

Household appliances with gasoline engines require a responsible approach to maintenance. To enjoy the trouble-free operation of your lawn mower for a long time, it is necessary to use fuel and lawn mower oil according to the instruction manual. Two-stroke gasoline engines work with oil added to the mixture, four-stroke engines have a separate tank in the fuel tank.

Let’s deal with the choice of gasoline for the lawnmower AI-92 or AI-95

As many people, as many opinions, which applies not only to the choice of oil for grass trimmer, 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). But everything is not so simple here, because at every gas station gasoline brands only have the same name, but have completely different compositions. Need to understand, and come to a single conclusion about what brand better to fill the gasoline in a two-stroke motor for your trimmer for grass.

Manufacturers recommend using A-92 gasoline for their equipment, and some models require the use of A-95 grade, which does not contain ethanol. It is not recommended to use gasoline of AI-90 grade and below, as they will lead to rapid wear and tear of the engine parts. Buying gasoline of one brand, you can not be 100% sure that it is true. The result is the following picture:

  • The manufacturer recommends pouring fuel into the trimmer for grass AI-92 brand
  • The farmer only uses gasoline of this brand, but buys it at gas stations where the price is lower or where it has to
  • This negatively affects the internal parts of the motor, because at one gas station. it is really high quality gasoline AI-92, and at the second. in the best case, 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 necessitates its overhaul. So you don’t have to analyze the quality of the fuel or buy only expensive gasoline, it is recommended to fill up only at one gas station. Gas stations fill gasoline only in metal canisters, not plastic canisters.

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

How to start a STIHL 180 chain saw correctly?

If you are not sure how to start your STIHL Mini-Saw 180 from cold, it is a good idea to follow the manufacturer’s instructions and guidelines, just follow these steps:

  • Switch on the ignition (to learn how to set the ignition on the STIHL 180 chain saw, see the machine’s data sheet).
  • Set the control lever at the lowest point (this way the carburetor choke will block the air from the filter, and the throttle will be fully open and the fuel mixture can be enriched).
  • Pull the starter grip and do this several times before the first spark occurs. This will signal that the fuel has gone straight into the cylinder and that your machine is ready to start.
  • Now you can move the lever one section up, with the throttle remains in the same position and the air dam opens.
  • You just have to pull the starter. In doing so the STIHL MS 180 chain saw will operate at a higher rpm.

Step-by-step instructions for refueling

If you want to fuel your chainsaw, follow a simple algorithm:

  • Prepare fuel in the recommended proportion of gasoline and oil for two-stroke chainsaws.
  • Prepare the saw for refueling by cleaning sawdust and shavings from the surface of the saw.
  • Position the chain saw on a flat, stable stand with the throat of the tank up.
  • Carefully place a small funnel (plastic or metal, resistant to fuels and lubricants, it is easy to buy a suitable one at the auto supply store) into the open throat of the tank
  • Carefully filling the tank with fuel, making sure it does not overfill. Never fill under the cap. it will spill out when the cap is screwed on!
  • Close the fuel tank with the lid
  • Change the chain lubricant (absolutely!)!)
  • Try to start the engine at idle speed.

STIHL chain saw oil

It is a good idea to remember that all STIHL chain saws are built small enough, but in this size they are very powerful. This is the reason that STIHL chain saws are so popular. Longevity of chain saw in spite of its high quality depends on using the right lubricant and fuel. The first worrying question ever faced by STIHL chain saw users is: Which oil and fuel to choose for your chain saw?? In this article you will learn what kind of oil to use for your chainsaw and what kind of fuel to put in your “babe”.

Choosing a STIHL chain saw oil

The first thing you should know is that almost all STIHL chain saws are equipped with a carbureted two-stroke engine. They also have two separate tanks: the first for oil and the second for gasoline.

First, and most importantly, remember that domestic-made chainsaw models are filled with simple oil, which is usually poured into motorcycle tanks, and their proportion should be no more than 1 to 25. As for chainsaws made abroad, you have to buy brand-name oils, for which the ratio is 1 to 40. Of course, you can try to put imported saw oil for domestic saws, in which case, the power of your tool can drop noticeably. The best advice you can give when buying oil for this kind of equipment is to refer to the manual for your tool.

If you own a STIHL chainsaw or would like to buy one of these models, here is an overview of the STIHL MC 180.

A good choice would be a synthetic oil for air-cooled two-stroke engines of class API-TB and API-TC. When you go to the store, ask the salesperson for brands like STIHL, Husqvarna, HAHOTEK, Champion, ALCO and others. Do not be stingy with ingredients, it is better to spend money for a quality product than to spend a lot of money for repairs.

Selecting gasoline for your STIHL chain saw

When choosing gasoline for your chainsaw, you should pay attention to the quality of gasoline itself and, of course, its octane number. It is best to buy gasoline with the octane number of AI92. You can choose straight A95, but there are lots of questions about its quality. And if you have any doubts about the quality of AI95, you might be better off with AI92.

Do not use gasoline that has been sitting in a container for a long time, in a can, in a tank or anywhere else. Only fresh gasoline should be used for the fuel mixture, otherwise it may lose all its useful qualities: octane number, etc. If you still use gasoline that is not fresh, your chain saw will not run at full capacity. If your chain saw breaks down because you are using such fuel it is expensive to have it repaired, because this is not covered by the warranty and you would be better off getting a new chain saw.

making a fuel mix of gasoline and oil

Before you mix your STIHL chain saw with fuel, refer to the instruction manual from the manufacturer. Why do you need to do that?? The thing is that with insufficient oil in the gasoline, the cylinder and the piston will get very hot, which will lead to scuffing, which will lead to the failure of the cylinder, and as a consequence. to expensive repair.

In order to prepare a quality fuel mixture, you need to mix oil and gasoline in a precise proportion. If there is more oil than necessary, it can lead to the appearance of carbon deposits on pistons and spark plugs. If you go a little overboard with the gasoline, then expect the rapid demise of your engine. For example, on average, one liter of gasoline should be mixed with 20-50 ml. oil. For Stihl, it is recommended that you pour 4 liters. Gasoline. 100 ml. oil. In this ratio, the mixture for chain saws is prepared up to 1.5kW. If the power is more than 1.5 kW, you should fill 100 ml. oil to 5 liters. too much gasoline. But these are all approximate calculations, always use the proportions given in your saw’s manual if you don’t understand how much and what you need yourself. But don’t put much faith in the numbers on the oil label.

It is also necessary to know how to handle the mixture already prepared. Here are some useful tips:

  • Don’t leave the ready mix in stock;
  • Use it for a month;
  • Do not leave the mixture in the sunlight or in an open container;
  • Do not let water and dust get in there. otherwise it will lead to carburetor failure.

In what to dilute the fuel mixture?

Let’s imagine you’ve already decided on the exact proportions, the next question you’ll be interested in is: “What to mix gasoline and oil in?” Well, what can I say, you can use an ordinary canister, syringe and more. But nowadays there are much more practical variants: bottles and canisters with dispenser with special containers for gasoline and oil. Using these products, will save you a lot of time and make it easier to prepare to start the chainsaw.

You need quality components

Practice proves the influence of the quality of the prepared mixture, taking into account the right proportions on the operational life of the tool, power, performance :

  • It is not recommended to use components that have expired shelf life.
  • Particularly important for gasoline and oil components. do not use components derived from gas condensate, because its molecular structure contains harmful, for internal combustion engine blends and water.
  • AI-92 partially inconsistent with international standards. AI-95 brand is saturated with detonation dampening additives.

The mentioned disadvantages limit the service life of manual chainsaws, the internal combustion engines of which run on complex fuel mixture consistencies.

Chainsaw Specifications

Each chainsaw has three basic elements that make it run. These include a 2-cylinder carburetor engine and two tanks. One is filled with fuel mixture, the other with oil required for chain lubrication. The volume of the fuel tank is 0.25 liters, which allows you to work without stopping for 45-55 minutes. The oil volume is about half as much. With this volume ratio, the contents of both tanks run out almost simultaneously.

STIHL 2-stroke engines do not use an oil pump system, so STIHL chain saws put oil in the gasoline to lubricate the shaft, piston and other working parts. Attempts to work on one gasoline, or failure to comply with the specified proportions in the manual on the composition of the fuel and lubricant mixture of the two components lead to tool failure.

What kind of gasoline for your STIHL chain saw?

Incorrect operation of any tool not only significantly shortens its life, but also makes it potentially injurious. In particular, this applies to devices with initially the highest risk of injury, which includes and chainsaw.

To be sure, the first step in the correct operation of a tool is to set it up for use. What kind of gasoline to put in a STIHL chain saw?? What gasoline should I put in my chainsaw? First of all, to fill up the STIHL chain saw. What kind of gasoline to fill your STIHL chain saw?? And although in itself refueling a chainsaw is not a supercomplicated operation, its incorrect or careless performance can be the cause of a severe risk of breakage of the tool and injury to the person working with it.

How to prepare the fuel mixture

Virtually all chainsaw engines in use today are two-stroke engines. In practice that means that to work normally and safely they do not need uncontaminated petrol, but a fuel mix of petrol with a certain proportion of motor oil added. This is a feature of all two-stroke engines: during operation, they are lubricated by oil which flows into the cylinders at the same time as the petrol.

Optimal engine oil to gasoline ratio in a chainsaw mixture is usually assumed to be 1:50.

Your chain saw manufacturer generally indicates the octane rating and oil recommendation for optimum performance in the instruction manual. Gasoline is not mixed with pure gasoline; mix it with what kind of gasoline to put in your STIHL chain saw.) в. How much fuel to put in your STIHL chain saw?? What to put in a 2-stroke engine oil. The same manual also specifies the optimum ratio of engine oil and gasoline, and this ratio is not static, and depending on the type of oil varies in the range from 1:25 to 1:100. What kind of gasoline to put in a chainsaw?? Husqvarna, Partner. But in the vast majority of cases the ratio 1:50 is used, and quite often this ratio is used when there is no instruction manual (for example, when buying a used chainsaw).

But such actions are still not entirely justified. What kind of gasoline to put in a STIHL chain saw?? What to pour the amount of oil, but in. The engine in a modern chain saw can reach a maximum speed of 13,500 rpm. per minute, which leaves no room for experimenting with its lubrication. STIHL chain saw, what kind of gasoline to fill up with 92 or 95 ? What gasoline do you need for your chain saw? The only thing that is justified is to allow when preparing a fuel mixture for a used chainsaw, whose engine is already badly worn, to increase the initially recommended amount of engine oil added to gasoline by 5-6%.

READ chain saw ignition clearance

To prepare the fuel mixture it is desirable to use a special container with markings on the body.

The numbers in the ratio show how many parts gasoline to 1 part oil. If you translate the ratio 1:50 to a more familiar system of measures, it means that 1 liter of gasoline needs 20 ml of oil. How much gas do you fill your STIHL chain saw with?? Do not pour pure gasoline.) в. Prepare the fuel mixture in the specified proportions in a certain sequence.

Pour all the oil into the iron container first, then add half of the desired volume of gasoline. What kind of gasoline to put in your STIHL chainsaw? Use plastic canisters or plastic bottles for this purpose is not recommended, because their material can react with gasoline, quickly oxidizing. STIHL chain saw what kind of gasoline to use on a STIHL chain saw what kind of gasoline is written in. Then the oil and gasoline are thoroughly mixed until the mixture becomes homogeneous, only after that is added the second half of the gasoline, bringing its amount to the required volume.

How to prepare fuel mix for your chain saw


Gasoline should be of octane number not less than АI92. You can also fill and AI95, but its quality at our gas stations leaves much to be desired, so if you are not confident in the quality of the 95 th, it is better still for the breeding of gasoline in a gasoline saw take gasoline brand AI92. Do not take gasoline which has stood in a can, tank or any other container for a long time. To prepare gasoline mixture into a chain saw it should be fresh, otherwise it loses its properties, in particular the octane number, and even if you run the chain saw on such fuel, it will not give full power. And the saddest thing is that a chainsaw breaks down because of low-quality fuel is considered a non-warranty case and leads to expensive repair. Sometimes it is easier to buy a new chain saw than to have it repaired after such a failure!

Read more about chain saw gasoline here:


The American Petroleum Institute (API) 2-stroke engine oil is rated API-TB, there are also API-TC oils, but they are designed to operate at lower loads than most of our common chain saws. If we take power class according to classification of Japan Automobile Standards Organization (JASO), then focus on JASO-FB and JASO FD classes (see also: JASO-FB and JASO FD classes).Table 1 below.).Do not use oils for four-stroke engines under any circumstances! Remember that in a two-stroke engine the oil has to burn completely, which means it’s better to use synthetic oil, because it gives less smoke and combustion residue. And if you pour four-stroke oil into your chainsaw, which will not burn completely, and as a result the soot will form, you will have a failure of the cylinder head. The best guide for choosing chainsaw oil is the instruction manual for your chainsaw.


When preparing your chainsaw fuel mix of gasoline and oil, be sure to follow the manufacturer’s recommendations. Why it is important to follow these recommended ratios? With little oil in the gasoline will cause heating of the cylinder and piston and respectively will cause scoring, which leads to failure of the cylinder and repair. If there is a lot of oil in the gasoline, however, it is a fouling and again a failure.Each manufacturer has their own recommendations for the proportions (see.see table 2 below). Try not to store the ready mix for more than a month. Do not store it in direct sunlight or in the open. Always keep clear of water and dust as this would damage the carburetor, since the fuel filter is often incapable of cleaning the fuel.

Since often come from search engines on queries narovrode “how much oil to pour 1.2.5 liters of gasoline,” I add another table under which you can find out how much oil to add to gasoline according to the accepted proportions. For the proportions, see table 2 or, more accurately, your chain saw’s manual.

Devices for diluting fuel mixture

Of course you can use a canister, syringe, or measuring jug, but there are more convenient ways. It is worth noting that STIHL fuel oils, for example, are available in two different packaging types: with and without dispenser. The price difference is not much, but the dispenser bottle makes the blending process much easier. There are also many different canisters with dispenser, with separate compartments for oil and gasoline. All of these attachments shorten the time it takes to get your chainsaw up and running.

STIHL oil canister with oil and petrol compartment

This canister has two compartments to store oil and gasoline separately. The petrol can has a capacity of 5 liters and the oil can has a capacity of 3 liters. Many owners of power tools with two-stroke engines often carry oil in a given canister in one compartment and a ready-to-use fuel mixture in the other.

Husqvarna canister with compartments for oil and fuel mixture.

Husqvarn jerrycans have a special feature: the oil canister can be detached from the main jerrycans and used separately.

What is the right way to dilute it??

The figures for dilution ratios are given with such precision for a reason. That is, it does not say that “take about this or that amount of oil. You can’t measure the exact proportions by eye, so you have to use something that measures out the exact amount of oil and gasoline.

Some inexpensive chainsaws usually come with a gauge with gauges. As a rule, there are some scales on it for different proportions. Or one if the manufacturer assumes that this jar is to be used only with the saw which it’s a part of. On this scale there should be two horizontal dots. The bottom one shows the level to which you need to pour the gasoline. Upper. the level to which the mixture should reach after adding oil to the gasoline.

You can use a medicine syringe to measure the oil more accurately. Preferably not less than 20 ml.

In general, pour the measuring container of gasoline, add the required amount of oil measured with a syringe and shake.

Mixture must be prepared in a separate container, not directly in the tank of the chainsaw. Otherwise, before the oil is diluted with gasoline, it could get into the carburetor, complicating start-up and even necessitating carburetor removal and cleaning.