The scientific way to determine this is to leave the oil in until the engine fails. Then replace the engine and always change the oil a few miles short of that point. Sort of like determining the weight limit on a bridge.
Not a real member - just an ordinary guy who appreciates being able to hang around and say something once in awhile.
Happily Trapped In the Past (Thanks, Joe)
Not only a less than minimally educated person, but stupid and out of touch as well.
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