Quote:
Originally Posted by SCHMOUPE
Also, if I shorten the oil change interval to 5k which I always did with exception of last year, would that throw off numbers? I would think yes but not by much.
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I think that if you shorten the oil change interval to 5000 miles that you should expect to see 8 ppm lead (based on your 7k sample). Anything below that would be an improvement.