GC 0w-30 in 2004 CTS 3.6 with 50000 miles

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Dec 24, 2006
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TX, USA
i havent changed the oil since last year. i put about good 8000 miles and changed the filter once.

i recently check the oil level and it was topped and looks clean (light amber/brown color).

when should i change my oil?? any suggestions?
 
This is a totally loaded question. I'd get a UOA done on the oil and see how much, if any, TBN is left and then make your decision off of that. Considering it's been over a year since your oil change, you may want to do it regardless.
 
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