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

Answer Posted / naveen rohilla

We are using oil with petrol in two stroke engine because
their are no force feed system to lubrication the
component.Two stroke engine have no inlet and exhaust valve
so no need of lubrication for cylinder head. the air/fuel
mixture follow via crankcase we need to lubricate only
crankcase ( cylinder wall, connecting rod, piston pin etc.)

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