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Originally Posted by Huck BB62
Trust it. Changing oil at 3000 miles is a waste of money, and of oil (ahhhh precious oil) Today's fuel injected engines don't crap the oil up like the old carbed/choked engines. I can't find it right now but I've seen tests confirming that GM's oil change intervals are still conservative. If have any fears, run synthetic, get better oil AND the piece of mind. The computer's going off of how you drive. Trust it.
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AMEN
It does side on the conservative side. It calculates the engine oil life dependent upon engine startup temps, engine run time, speed, engine temps, air intake temps, etc.
It does assume you are using the specified oil that meets GM specifications, it also assumes you are running a paper filter. (Foam filters allow more dirt into the system.)
I have personally verified the system is conservative with my Vette, by having oil samples run by a firm called Blackstones in Indiana. Even with 10 percent left, the analysis indicated the oil was good for thousands of miles of further use.
I don't believe there is a way to check the oil life without a Tech 2, or via the Onstar monthly email>