why we are using oil with petrol in two stroke engines but
not in four stroke engines(two wheelers)?................

Answer Posted / krishna kumar

2 stroke is much simpler machanism. It has inlet and
exhaust ports. There is no valve mechanism as in the 4
stroke engine. So lubrication in 2 stroke is much simpler
and just add oil into the petrol for lubricating the moving
parts like piston assy. Whereas 4 stroke requires more
machanism and seperate lubrication system.

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