In a 2 Cycle engine this is done in 2 piston strokes (one up and one down the piston cylinder).For a 4- cycle engine the piston moves up and then down the engine cylinder 4 times to accomplish fuel intake or induction, compression, fuel ignition (combustion) and exhaust.But how are 2 and 4 cycle engines different? Essentially the numbers 2 and 4 refer to the number of piston strokes the engine takes to cover the complete fuel combustion and exhaust process. As a technology leader in lubricants, Castrol formulates engine oils that can be used in 4 cycle engines and 2 cycle engines.
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