Gasoline to Oil Ratio for Husqvarna Chainsaw

Chainsaw Oil to Gasoline Ratio

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

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

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

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

What gasoline to pour into a chainsaw

Let’s find out what kind of fuel is recommended for this type of device. Since there is a 2t (two-stroke) engine on chainsaws, and an oil pump cannot be installed on it, it is forbidden to use pure gasoline for the saw. A fuel mixture of fuel and oil is poured into the saws. The norms for refueling chainsaws of different models are regulated by the manufacturer.

Consider what kind of gasoline to pour into the chainsaw experts advise. Refueling the chainsaw is carried out with a fuel with an octane number of more than 92. To create a mixture, you must not use fuel with an expired shelf life, made from condensate, which includes water and various impurities.

Domestic saws run on AI-80 fuel. For foreign modifications, AI-92 gasoline is needed. It often happens that the instructions indicate the grade of AI-95 fuel. But experts believe that AI-95 gasoline, which is produced in the Russian Federation, does not meet the quality standard. This fuel contains many anti-knock additives.

It is possible to use such gasoline for a chainsaw when creating a mixture only with its high quality. The complexity of the application lies in the use of additives, with the help of which manufacturers increase the performance characteristics of a fuel that has a lower octane number. Therefore, it is not recommended to fill in 95 gasoline.

How to dilute gasoline with chainsaw oil?

A mixture of gasoline and oil must be constantly prepared in a clean container, on the walls of which there are measuring marks. This will give the owner of the chainsaw the ability to accurately determine the amount of gasoline and engine oil they are mixing. The material from which the container is made must be resistant to the effects of gasoline. Metal vessels are well suited for this.

Pour fuel and lubricant through a watering can to prevent loss of components. In order for the used lubricant to completely dissolve in the fuel, the filled container will need to be shaken several times. As a result, the gasoline mixture should become uniformly colored. In this case, you need to make sure that there is no precipitation at the bottom of the vessel.

What fuel to use for a chainsaw?

Choosing the right fuel is an important and significant issue. The only correct approach to its solution is a careful study of the user manual, which indicates the type and brand of fuel, the proportions of mixing gasoline and oil, and also reflects all the features of this tool. Modern standards require the use of high-octane refined fuels and special types of engine oil.

Oil for two-stroke engines of chainsaws

Modern gasoline saws can be equipped with 2-stroke or 4-stroke engines. In the latter, oil is initially supplied to the parts of the crank-connecting rod group directly from the motor crankcase.

Unlike them, in two-stroke factory engines, the fuel enters the plane located under the piston. To refuel such chainsaws, engine oil must be added to fresh gasoline. It lubricates the rubbing engine parts, preventing their premature wear.

Oil for 2-stroke chainsaw engines must comply with a number of important parameters:

  • when burning oil, a minimum amount of ash should be formed. It is best that the oil used is burned out in full;
  • the lubricant must dissolve quickly in gasoline;
  • oil for 2-stroke engines must be free of harmful impurities that can lead to blockages in the carburetor lines.

The choice of oils for 2-stroke engines largely depends on the types of cooling systems. For the lubrication of internal combustion engines equipped with air cooling systems, 2T standard formulations are suitable. For engines cooled by liquid systems, choose oils marked TC-W3.

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In any case, the oil for permanent lubrication of the engine of the tool used must be of the highest possible quality. During combustion, low-quality oils form a large amount of carbon deposits, which settle on the cylinder walls and under the piston rings of the internal combustion engine. Because of this, the standard rings lose the ability to compress, as a result of which burrs appear on the inner walls of the engine cylinder. In addition, poor-quality lubricant leads to overheating of the parts of the crank mechanism. As a result, they jam and fail completely.

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What to use chainsaw oil?

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

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

Gasoline to oil ratio

The standard ratio of oil to gasoline, which is relevant for most chainsaws, is 1 to 50. This means that 20 ml of oil must be added to 1 liter of gasoline. However, each manufacturer has its own requirements for the composition of the fuel mixture, which are due to the design of the engine, the peculiarities of its parameters and other factors. It is impossible to determine on your own what proportions are best suited for a given instrument.

Complete and accurate information can only be obtained from the user manual. If it does not contain any instructions regarding the composition of the fuel mixture, then generally accepted practice should be followed and make it in a ratio of 1: 50. There are other options, from 1: 20 to 1: 50.

Figure 3. The ratio of oil and gasoline for the fuel mixture

Is it possible to pour 95 gasoline into a chainsaw?

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

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

Fuel mixture: the proportion of oil and gasoline for the chainsaw

The chainsaw engine is the heart of the tool, so it is very important to use a properly prepared fuel mixture.

The fuel mixture for a chainsaw is prepared from two components. oil and gasoline. Chainsaws are equipped with two-stroke engines, so oil is not added to the lubrication system (like in a four-stroke engine), but directly to gasoline. At the same time, it is very important to observe the correct proportions of ingredients, of course, in no case try to work on pure gasoline, because in this way you will very quickly “kill” the chain saw.

If we talk about what kind of gasoline to pour into the chainsaw, then it will be optimal to use fuel with an octane rating of A-95, in this case the savings on fuel can turn out to be deplorable. Often European manufacturers indicate that it is possible to use A-90 or A-92 gasoline, but in post-Soviet countries the quality of gasoline is inferior to that of Europe, so in our realities it is better to use better quality gasoline.

As for the proportion of the petrol-oil mixture itself, everything is simple here: you must follow the instructions for the tool. All manufacturers of chainsaws indicate the required ratio in the instruction manual or in the passport of the tool, in addition, the proportions for refueling the chainsaw may differ depending on the model of the chain saw. As a rule, the proportion of oil and gasoline to a chainsaw of famous manufacturers is a ratio of 1:40 or 1:50, which means 1 part of oil for, for example, 40 parts of gasoline. Now arithmetic 1 liter of gasoline = 1000 ml of gasoline, divide by 40 and we get 25 ml of oil. If you follow the same steps to a ratio of 1:50, you get 20 ml of oil per 1 liter of gasoline. As for budget chainsaws made in China, the situation is slightly different. The ratio of gasoline to chainsaw oil made in China 1:25, that is, divide 1000 ml of gasoline by 25, we get 40 ml of oil. The thing is that in branded chainsaws, a solid assembly and the distance between pistons and cylinders in the engine is much less than that of Chinese chainsaws, therefore, the required amount of oil differs almost twice.

Use a conventional medical syringe with sufficient volume to measure the correct amount of oil.

Another subtlety. first fill the dry gasoline can with gasoline and then oil. The procedure, on the contrary, is fraught with a poor quality fuel mixture, because the oil is denser, it will stick to the bottom of the canister. what a good mixing here.

Be sure to prepare the fuel mixture in a canister and pour ready-made special fuel into the gas tank! Never cook or mix directly in the fuel tank of your chainsaw!

If you figured out the question of how to breed gasoline for a chainsaw, then on storage conditions and shelf life of the fuel mixture it is worth saying a few words. It is best and easiest to prepare a petrol-oil mixture for 1 liter of gasoline, it is recommended to do this immediately before working with the tool. Chainsaw fuel tanks have a volume of 0.3 to 1 liter. In the conditions of domestic use, the entire volume of the prepared combustible mixture is rarely used in one session, so the remainder can be saved until the next session. It is necessary to store the fuel mixture in a special canister for gasoline, in a dry, dark place. It is optimal to count that the shelf life of the finished mixture will be 7-10 days. The fact is that the oil on the market now is not synthetic, but organic, that is, natural. After 10 days, all lubricating properties are lost, gasoline simply “eats up” the oil. Naturally, it is no longer possible to use such fuel, this can cause breakdown and failure of the chainsaw.

At the end of the work, it is necessary to drain the fuel mixture, start the chainsaw, the tool will stall (so that the saw has a dry carburetor) and now you can leave it until the next operation.

Unsuitable fuel mixture must be disposed of.

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Caution. counterfeit!

Small private companies from China and other Asian countries specialize in the production of motor oils, which are sold at a lower cost in the markets under the trademarks of leading manufacturers.

  • The characteristics of counterfeit products are an order of magnitude lower than those of the branded originals. The constant use of counterfeit products adversely affects the operation of the chainsaw and the durability of its operation.
  • Only an experienced specialist can determine the status and quality of oil, therefore, you can avoid possible risks by buying consumable components in a network of branded and licensed retail outlets.
  • The use of substandard lubricants for service specialists is a legal basis for depriving the owner of a faulty saw of warranty repair and restoration obligations.

Storage advice

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

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

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

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

Benefits of branded oils

Many domestic and foreign manufacturers specialize in the production of special motor oils, but the highest rating indicators are for branded products from STIHL, Husqvarna and Makita.

Only in certain parameters are the domestic motor oils of the Lukoil trademark inferior to the branded assortment.

The list of advantages of branded engine oils includes:

  • economical consumption;
  • stability of performance under difficult operating conditions and during long-term storage;
  • minimum amount of toxic compounds in exhaust gases;
  • almost complete absence of carbon deposits.

According to the American classification, API-TB oils can be used for work in household and professional models. The Japanese counterpart is JASO-FB and JASO FD. Preparation of a combustible mixture using oil for 4-stroke engines is strictly excluded.

Red, green or any other color of oil determines the product belonging to the assortment of a certain manufacturer, therefore, when determining the characteristics of the material, it is not taken into account. Be extremely careful when choosing a motor oil of unknown composition and origin.

Husqvarna chainsaw Combi Oil and Fuel Can review

Until you receive additional information about the quality and operational parameters, it is better to temporarily refuse to use such material.

It is allowed to mix motor oils of the same type in composition and purpose, produced by brands known for the quality of their assortment. Under no circumstances is it allowed to mix mineral and synthetic oils.

The ratio of gasoline to chainsaw oil

Household and professional chainsaws are powered by two-stroke internal combustion engines operating on a metered mixture of gasoline and engine oil adapted to the difficult operating conditions. The correct proportions of oil and gasoline for a chainsaw is one of the important conditions for stable traction characteristics of the engine and low-cost development of its assigned resource.

The need to obtain a sufficiently high power from a small-cube power unit makes it necessary to operate chainsaw engines at high-speed modes, therefore, increased requirements are imposed on the quality of both components of the fuel mixture.


The main component of the fuel mixture for chainsaw engines is gasoline with an octane number of at least 92. Consumables with expired storage, made on the basis of gas condensate, which have water and mechanical impurities in their volume, are not suitable for the preparation of fuel.

  • The opinions of experts on the use of gasoline of different brands are ambiguous. On the one hand, the incomplete compliance of domestic gasoline A-92 with European standards is recognized.
  • On the other hand, the quality of A-95 gasoline is questioned due to the high content of anti-knock additives. It is possible to use this fuel for the preparation of fuel for a chainsaw only with full confidence in its quality.
  • The difficulty lies in the presence of various improving additives, with the help of which unscrupulous manufacturers and distributors increase the performance properties of motor gasoline with a lower octane index.

Also, irreversible changes in the working properties of the fuel occur when it is stored for a sufficiently long time in a plastic container, regardless of the level of its petrol and oil resistance.


Stricter criteria for the selection of the oil component. In the best variant, it is a mineral or semi-synthetic engine oil recommended by the manufacturer, intended for operation in high-speed two-stroke air-cooled internal combustion engines.

The advantage of mineral oils is their lower cost. Their more expensive semi-synthetic and synthetic counterparts are distinguished by improved performance and compliance with environmental standards.

  • maintain working properties in a wide range of operating temperatures;
  • do not form carbon deposits;
  • contain detergents, antioxidants, preservatives and other additives useful for the operation of the power unit.

Working proportions of the fuel mixture

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

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

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

Self-selection criteria

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

  • For budget models, you can use oils of the Standard category, for professional chainsaws, consumable lubricants of the Super and Ultra categories are recommended.
  • To prepare a full-fledged fuel mixture for a chainsaw, it is advisable to use branded oils or their branded counterparts recommended by the operating instructions. In particular, STIHL and Husqvarna engine oils of the same composition and application are completely interchangeable.
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Experts recommend that owners of chainsaws exclude from the scope of attention motor oils intended for two-stroke engines of mopeds, boat motors and other mechanized household appliances.

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

How to dilute for a Husqvarna saw

The manufacturer recommends the use of a special oil for Husqvarna in the operating instructions. It is adapted to the engines of this manufacturer, ensures a long service life and high-quality performance. Filled in a ratio of 1:50.

It is strongly not recommended to add oil for water-cooled two-stroke engines, for example, for outboard motors.

It is allowed to use oils for two-stroke air-cooled internal combustion engines from other manufacturers. If the proportion is not indicated on the canister, the chainsaw manufacturer Husqvarna recommends filling in an increased dose, in a proportion of 1:33.

Thus, 1 liter of gasoline for a Husqvarna chainsaw is filled with:

  • 20 ml (colloquially grams) Husqvarna oil (1:50).
  • 20 ml of other acceptable oil if the canister says 1:50.
  • 30 ml for 1 liter of gasoline, 1:33, unless otherwise indicated.
gasoline, ratio, husqvarna, chainsaw

Husqvarna does not recommend storing the prepared mixture for longer than 30 days. Before pouring, the settled mixture must be shaken.

How to thin for STIHL, in particular for the MS 180

The manufacturer recommends for the engines of its chainsaws, including the STIHL 180 MC model, HP Ultra oil in a ratio of 1:50. It provides the highest power, service life and cleanliness of the internal combustion engine. It is also recommended to use engine oils in STIHL labeled containers. It is important here to purchase original, but not counterfeit products.

How To Use 2 Stroke Oil to Fuel and Lubricate Gasoline Powered Chainsaws | Husqvarna

A mixture of gasoline with some oils is considered perishable, it is recommended to use it no later than 10-30 days after preparation.

In the case of a mix of oil and gasoline recommended by Calm, this is not the case. The mixture can be stored for up to 2 years. After long-term storage, the container must be shaken to mix possible sediment.

Motomix. STIHL ready-mixed fuel mixture, very convenient when there is no time or opportunity to mix fluids on site

For all chainsaws, unleaded gasoline with an octane rating of at least 90 is used. That is, AI-92, AI-95, AI-98. over, the most common and suitable option is AI-92. Gasoline with octane numbers 95 and 98 is recommended in cases where the engine runs mainly at high revs. We also recommend reading in more detail about the choice of gasoline.

An example of preparing 1 liter of a mixture in a ratio of 1:50.

  • The capacity is approximately half (0.4-0.6 l) filled with gasoline.
  • Pour 20 ml of oil into a clean liter container.
  • Close the lid, shake the fuel until it becomes uniform in color.
  • Gasoline is added to a liter, the lid is screwed on, the container is turned over several times.

Gasoline already diluted with oil mixes very easily with refilled clean gasoline, therefore, it is not necessary to mix strongly again.

The oils are painted in different colors, red or green. Therefore, by the uniformity of the color of the mixture or clots of different colors, you can clearly see whether the oil has stirred or not.

When oil overflows, the engine emits smoke. But smoke immediately after a cold start is in most cases typical for cold engine operation. After a few minutes of operation and warming up of the combustion chamber, the smoke disappears.

Refueling during running-in

When running in, all rotating and mating assemblies and engine parts are rubbed in. In some places, increased friction is possible, which can be stopped by additional lubrication.

In the operating instructions of most models and brands, there is no specific indication of the amount of oil for the break-in period. But many experts, with many years of experience, recommend pouring 20% ​​more during running-in.

For example, if a ratio of 1:50 (20 ml per 1 liter) is indicated for a specific chainsaw, then another 20% should be added, that is, a fifth. 4 ml. As a result, pour 24 ml per liter.

The break-in period is approximately 10 engine hours. During this time, a small excess of oil will not do any harm. However, the running-in will take place in a more gentle mode, which in the future can increase the engine resource.

How to dilute gasoline with Huter saw oil

The manufacturer Huter does not allocate any one brand of oils for its chainsaws. There are recommendations for the general type. oils of the JASO FC classification or others: API TV, API ТС, JASO FB for two-stroke air-cooled internal combustion engines.

If the oil does not meet these standards, then problems and engine breakdowns may occur due to poor-quality lubrication.

In the instructions for use, Huter does not himself name the proportions, but indicates that the mixture is formulated in the proportion indicated by the oil manufacturer.

For example, if the canister reads 1:50, 20 ml is poured per 1 liter of gasoline. If 1:40 is specified. 25 ml per 1 liter.

How to Mix Fuel for a Husqvarna Two Stroke Engine Chainsaw

The ratio of oil and gasoline for chainsaws of famous brands, the correct proportions, and also what should not be diluted

The preparation of the fuel mixture is a very important process, both the consumption of gasoline and the service life of the chainsaw depend on the observance of the correct proportions of gasoline and oil. Many are accustomed to stirring 1:50, but this is not correct, because the ratio of these two components is different for all manufacturers. Within the framework of the article, we will figure out what the most famous manufacturers recommend to fill in, in what proportions, and also give an example of how to dilute and prepare fuel correctly.

Can I mix oils of different colors and brands??

It is not recommended to mix oils of different brands. First, they can be performed on a different, incompatible basis. synthetics, semi-synthetics, mineral. Secondly, different brand oils may contain different additives. How they can chemically react with each other and what is formed as a result, it is impossible to predict.

The main thing is that there is simply no need to do this. It is more rational to add the rest of one brand of oil to gasoline and work out a mixture. And then start using another oil.

Pay attention to the labels, these are 3 different oils from STIHL, all differ, both in characteristics and in color. They cannot be mixed with each other, as the manufacturer himself writes about in his instructions.