We have a 2003 2500 with the 8.1 only 20,000 miles but most of them pulling a 24 ft. enclosed car trailer. It used a quart per 1,000 miles up till 2 years ago, now it does not use any for some reason. We have used mobile one from day one also. Crazy.
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1979 Pontiac Trans Am
- W72 400 - 4speed
- WS6
- Heritage Brown
- Air Conditioning
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