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Message: <blockquote data-quote="t2ribena" data-source="post: 375700" data-attributes="member: 3847">astroboy...one observation i made on the N52 and other BMW performance engine that could also contribute to the engine oil missing... since the engine runs at high temp, oil gets evaporated and circulated in the valve cover case...and this valve cover case is ventilated or has a breather hose with oil separator to the intake manifold...by design the evaporated oil that escapes thru this hose is cooled at the oil separator where the oil is condensed and return to the oil sump...but with our weather here and the engine runs very hot, this evaporated oil has very little chance to be converted back to liquid and it travels all the way to the intake manifold and into the combustion chamber...in gas state, the engine oil is easily burned...after a prolong period this contributes to significant loss of engine oil... with this method of controlling emission from the engine, it causes loss of engine oil and loss of power...</blockquote>