make sure when you put in the new oil, flush out the old stuff with some clean oil. let it drain. If its really bad, have an oil change place throw some oil system cleaner in with your oil. Or you can do it yourself. Don't drain your oil, just add that stuff in, let it run for about 10 minutes, then drain. I don't know what its called though.
I just switched to castrol syntec. good stuff. I'll probably switch to the full synthetic stuff one my next change.
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