I did a fill up last week and drove down the Phils game in some stop and go traffic. Then drove to work all week which is a lot of stop and go with 35-45 mph so no overdrive. My gas mileage jumped at least 2.5 mpg so I think the winter gas is gone for sure. I think I would have gotten a little better if the traffic wasn't so bad heading down I95 to the game.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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