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DIFFERENCE BETWEEN 2-STROKE OIL AND 4-STROKE OIL

Both 2-stroke oil and 4-stroke oil is a special type of engine oil . But despite their common classification in the group of engine oils, both oils are very different and have different properties.

The differences between 2-stroke oil and 4-stroke oil are explained in this article.

Different functioning of the engines

A 2-stroke engine has a different operation than a 4-stroke engine.

The 2-stroke must be lubricated by a mixture of 2-stroke oil and gasoline (gasoline-oil mixture). This mixture is used for lubrication in the cylinder and the associated moving parts. Together with gasoline, the oil enters the combustion chamber and provides the necessary lubrication. In addition, there is a separate separate oil bath for the transmission: This is lubricated by special gear oil.

In the 4-stroke engine, however, the gasoline must remain oil-free. The 4-stroke engine has an extra oil circuit for the lubrication of the piston. In this oil bath is also the crankshaft and usually the transmission is also supplied by this oil bath.

In the 2-stroke engine, the 2-stroke oil must be added to the gasoline, while the 4-stroke gas burns pure. The 4T does not require any mixing, and the lubrication oil is in the separate oil circuit.

This results in the differences between 2-stroke oil and 4-stroke oil

This diverse mode of operation results in very different requirements for the oil.

Since the 2-stroke oil is burned in the combustion process, it must have the properties of a good and clean combustion. It has been specially developed to burn low in pollutants and has a low ash content. The viscosity (viscosity) is different.

In contrast, 4-stroke oil is not designed for combustion. But on the contrary on a long life and primarily on its lubricating properties. It has a high proportion of soot.
In addition, the 4T oil is not intended for mixing, which makes it more difficult to mix with gasoline.

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What happens when using 4-stroke oil in a 2-stroke?

If you pour 4-stroke oil instead of 2-stroke oil in the two-stroke, you will notice a strong smoke. The 4-stroke oil will not burn clean and it will leave a lot of deposits in the engine. 4-stroke oil is not meant to be burned. It therefore does not have the necessary properties that it can burn residue-free. For a long time, the engine and exhaust will “coke” so much that the performance slows, until the engine eventually stops working properly.

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