How far should I go on this oil change?

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wtd

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Jun 25, 2002
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southwest Mo.
before I do an oil analysis? I've got 4,000 miles on the 10W-30 Mobil 1 in my 98 chevy truck with the 5.7L. I've got a 3oz maintenance dose of Auto-RX in this oil and this is the first oil run since I did the initial full bottle of Auto-RX. This will also be the first analysis of 10W-30 Mobil 1 in this truck.

So when should I change it out to see how well its holding up?

Wayne
 
Do it now. Get a benchmark. Get fresh oil, then, for the brunt of the summer.
 
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