is your air filter getting evidence of oil from the inboard side? have your pcv valve checked, cleaned or replaced. pressure in the crankcase is normal to some extent since the piston rings have gaps regardless of how new the piston rings and the cylinder bores are. if the pcv valve is clogged up or stuck closed, the crankcase pressure pushes some oil vapors to the inboard side (cleaner side) of the air filter





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