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They also did that show on Mythbusters that really showed no gain from following on big truck other than literally being on his bumper physically which is dangerous
Actually, just the opposite. They confirmed that following big trucks does increase mileage even as far as 100 feet behind the truck.
It was better than the toyota pos i was driving. Its tdmopar59's old truck from this forum. I don't drive enough for a diesel or that would of been my first choice.