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Message: <blockquote data-quote="wc9922" data-source="post: 295117" data-attributes="member: 6000">Hey, you can be a skeptic if you want to, but good question anyway. Which brings to mind many troubled ridden E46 Valvetronic engines also makan minyak but no smoke or oily pipes or poss of power. No oil or white smoke not necessary mean no blow-by present. On Idle blow-by is really bad already.Blue smoke means piston ring sealing is already way out. On the other hand blowby which only happens on engine running condition with load ( transmission engaged and moving) is due to weak ring pressure sealing  between piston ring edge and the cyliner liner. The sealing pressure is radially outwards produced by the gases of the combustion chamber. Higher engine speed and load needs higher sealing pressures to work. The rings especially the oil scarper ring is not able to do it's job of getting rid of the excess oil on the downward or upward stroke. The oil on the liner is a film layer so burns undetected at the exhaust. I think they have to dismantle the engine and look at the condition of the liner and piston top to tell if it's drinking oil. some coke may form on the piston crown. This is one case of burning oil in the engine. Second condition is excessive combustion gasses passing the rings due to end gap clearence too large and goes into the cranckcase. This will build up pressure in your engine block and push more oil vapor through the crank ventilation system and into your manifold. This may apprear as oily coated valves and ports in the intake side. A loss of power is expected. Crankcase ventilation is to remove the buildup of pressure in the crankcase, creating partial vacuum condition inside so the rotating parts can move inside freely without foaming the oil in most part. Also protects the oil seals. Emmissions regulation dictates you need to burn the crank case ventilation gases, but in racing it's just out to a catch tank and vent the gas and return the collected oil into the oilpan. Check with Pussy on one of his past engine rebuilt where he was losing a lot of his engine oil from the engine when running despite getting power. It was found later wrong piston ring end clearances or wrong piston rings were used or something like that.</blockquote>

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