Sent a sample of my oil to Blackstone Laboratories for analysis. My oil had 7315 miles on it and the car was telling me it was time for an oil change. 2014 Chevrolet Cruze LT turbo with 39 258 miles. Car has always run on Mobil 1 full synthetic oil and OEM oil filters. I always change the oil when the oil life monitor tells me to. For anyone who thinks the oil change intervals are too long, this report should convince you.
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