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Engine valve tap?
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04-23-2010, 01:40 AM
BNaylor
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Re: Engine valve tap?
88K miles with an '08?
Why did you decide to use the Mobil 1 Extended Performance synthetic oil and 7K exchange interval?
It should be covered under the 5 year/100K mile powertrain warranty so take it to a GM dealership and see what they say.
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