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    Oldsmobile 307 V8 10w-30?

    Hi All I have a 1987 Chevy Caprice station wagon with the 307 Oldsmobile V8 (one of the best engines ever). I mainly use this car as a truck, pulling a boat and hauling around stuff that won't fit in the Focus. Right now I have it filled with 10w-30 Mobil 1. The car has 227,000 miles on it...
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