PowderBud

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Question Asked: What might be causing oil to blow out through the exhaust or to burn off?
October 28, 2011, 10:25 AM
I have no noticeable oil leaks, there's never any oil spots under my vehicle on the garage floor. I do find very black splatter behind my vehicle after idling for a time though. I'm going through about a quart of oil every two tanks of fuel, so about 700 miles or so. Gas mileage is good, sometimes great. Is this likely that the piston rings are not sealing well anymore? I have over 300k miles on the vehicle but still in very good condition for that many miles. Have never had a valve adjustment as I have been told that may cause poorer seating rather than better at this point, but I wonder if that could be causing leakage. My spark plugs look like they are burning clean, though a couple looked overly black after 100k miles.
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