Fuel Mileage
Tuned
Joined: Oct 2004
Posts: 300
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Bone stock (410s) at 55mph my truck will do a consistent 21mpg. At 75mph with the 355s it ranges from 16-17mpg. Towing my enclosed trailer (~3k lbs, but pushes a lot of air) still got 17-18mph at 55 with 410s, gets 15mpg at 75 with 355s. Got about 12 with the 410s at 75.
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Chevy_Eater
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
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Sep 9, 2021 12:29 PM
