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I record every drop of gas I put in my cars/trucks so I know my calcs are legit. But we all know that we will lose 2-3 mpg this time of year due to the gas formulation and cold air. I also don't make as many highway drives so that will hurt since I don't get to use overdrive.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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