Quote:
Originally Posted by regal
Maybe but I follow the manual and it says 3500 miles unless you drive like grandma. A UOA doesn't show even 10% of the additives in the oil.
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Maybe not, but it does show wear rates of the engine based on metal content. Readings in PPM is better than looking at a magnetic oil drain plug like you mentioned above. If those are in check then I think it's OK. Isn't the the point of oil?