Suppose your engine is leaking or burning oil but noticeably or only at higher rpm, why would higher rpms exacerbate leaks or burns?
asked Oct 17, 2018 at 21:52
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I would assume higher rpm-->higher suction and higher temp-->lower viscosity of oil which make it more likely to get in the combustion chamber.– ChebhouCommented Oct 18, 2018 at 10:07
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2 Answers
The higher the RPMS (Revolutions per minute) the faster the engine is spinning and the higher the oil pressure gets in the engine, thus if an engine is burning oil due to a worn out rings or worn out seals for example. It would be burning a lot more oil due to the faster spinning pistons and the more bangs occuring burning the oil off.
If there was a leak, say a valve cover leak, more oil is going up there due to the higher oil pressure and thus the oil leaks. And as mentioned by other comments the higher temperature lowers the viscosity of the oil making it easier to get into the combustion chamber, hence why people with engines that burn oil use a higher viscosity oil
Yes, especially if crank case ventilation is clogged.
