I'm a seasoned automotive expert with a deep understanding of engines and their maintenance. When it comes to the question of mixing 4-stroke oil with petrol, it's crucial to understand the fundamental differences between 4-stroke and 2-stroke engines and how they handle oil for lubrication.

4-Stroke Engines operate on a four-cycle process: intake, compression, power, and exhaust. These engines are designed with a separate crankcase where the oil is stored and circulated through the engine for lubrication. The oil does not mix with the petrol; instead, it is circulated through the engine via an oil pump. This system ensures that the engine parts are adequately lubricated without the need for oil to be mixed with the petrol.

On the other hand, 2-Stroke Engines have a different mechanism. They also complete the four strokes of operation but within two crankshaft revolutions. In 2-stroke engines, there is no separate oil sump or crankcase. Instead, the oil is mixed with the petrol, and this mixture is what powers the engine. The oil is necessary for lubrication as the mixture is burned in the combustion process, and the oil helps to reduce friction and wear on the engine parts.

Now, when you mention using 4-cycle gas, it implies that you are using fuel for a 4-stroke engine. In this case, you do not need to mix oil with the gas. The engine is designed to handle oil separately, and adding oil to the petrol can actually cause damage. It can lead to excessive smoke, reduced engine performance, and in severe cases, engine damage due to the incorrect mixture of fuel and oil.

It's important to follow the manufacturer's guidelines for your specific vehicle or engine. Using the correct type of oil and fuel as recommended is essential for the longevity and performance of your engine. Mixing oil with petrol in a 4-stroke engine is not only unnecessary but can also be harmful.

In summary, for 4-stroke engines, the oil is managed independently of the petrol, and there is no need to mix the two. Always consult your engine's manual for the proper maintenance procedures and specifications.

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4 cycle engines do not need oil mixed with the gas to provide lubrication, since it has oil in the crankcase. Two cycle engines have to have oil mixed in the gas to provide the lubrication needed, since there is no oil in the sump. When you used the 4 cycle gas, there was no much needed oil mixed with the gas.Jun 9, 2014read more >>