Why does a 2 stroke engine need oil mix?

Two-stroke engines require an oil mix for lubrication because they do not have a separate oil sump like four-stroke engines. In a two-stroke engine, the oil is mixed with the fuel and is then combusted along with the fuel. This provides lubrication for the engine's internal components, such as the piston, rings, and bearings.

The oil mix ratio for a two-stroke engine varies depending on the engine manufacturer and the specific model of engine. Generally, the oil mix ratio is between 2% and 5% of the total fuel volume. For example, a 50:1 oil mix ratio means that there is 50 parts of fuel to 1 part of oil.

It is important to use the correct oil mix ratio for a two-stroke engine because too much oil can foul the spark plug and cause the engine to run poorly, while too little oil can cause the engine to seize.

Two-stroke engines are becoming less common than four-stroke engines because they are less efficient and produce more emissions. However, two-stroke engines are still used in some applications, such as chainsaws, weed trimmers, and motorcycles.