Quote:
Originally Posted by tomi_k
Yes, PCV is connected to the engine oil "fumes" but principle is same.... intent is to re-circulate "fumes / vapor", not liquids (i.e. not oils)... EVAP is designed to re-circulate evaporated fuel from the gas tank... again, principle is same... re-circulating "fumes / vapors" back to engine intake manifold.
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But those fumes are released naturally, unlike what a gas vapor system would be supposed to do. Thermal energy to vaporize gas and eventually some oil too, should be accounted in order to find out how efficient it would be. Unless you'd resort to some sort of heat recovery from the exhaust, most likely there would be no improvement to the efficiency.