03-02-2007, 08:32 PM
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Hummer Guru
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Join Date: Jul 2005
Location: nonpiker
Posts: 5,900
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Re: When do you change your oil?
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Originally Posted by f5fstop
If people are worried about their oil, and were wondering if the oil still had some life after the change, they can always send a sample off to an independent testing lab and get the results back in a week or two. I have done this many times, even when going on the oil life monitor to the big zero, the oil still had a TBN (total base number) above minimum, and the adaptives were still present.
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