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Why consumption of lubricating oil is more in two-stroke cycle petrol engine than four-stroke cycle petrol engine?

saurabhjain

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Why consumption of lubricating oil is more in two-stroke cycle petrol engine than four-stroke cycle petrol engine?

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2-stroke engine consume oil but not significantly high compare to 4-stroke because of manifold configuration, that is why more engine especially larger one employ stuffing box to reduce oil from entering combustion chamber....

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Image shows only a 4-stroke Otto engine, though posting a 2-stroke image  beside would be easier to assimilate this issue.2-Stroke_Engine_ani.gif

Lubricating oil is mixed to the fuel so that it lubricates. This mixture must pass through the "window" jacket until achieve the combustion chamber, then it'll burn and be exhausted. Part of this oil return as cylinder rings sweeps and breams down, while other part can be further filtered in exhaust system, but a great amount leaves away along with residual combustion gases. Also, cylinder sweeps down only 1/cycle, meantime, in 4-stroke engines, it hapens 2/cycle. Maybe it helps lubricate too. (It has nothing to deal with number of cylinders, btw)

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