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

Answer Posted / enoch akot

It is just becuase in two stroke petrol engines the
crankcase is used to pressurized the Air Fuel mixture into
the combusting chamber and therefore if using the wet sump
system the combustion chamber will be filled with oil and
the spark plug will be coverd by burned oil that is why the
dry sump systerm is used.

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