Quote:
Originally Posted by tangofox007
What method(s) do you use to determine how well oil "holds up?"
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Not a very scientific method I'm afraid, more of an observation. The Castrol doesn't burn off as quickly during highway driving as other oils that I've used in the past. I realize that just because there's oil in the engine, I shouldn't assume that it's doing a great job of protecting my engine parts from wear, but I'll change the oil and filter at 3500 to 4000 mile intervals.