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Re: 88-90 454 gas mileage
Just measured the 1992 I just got. With 75% highway driving at 5 over the speed limits and accelerating slowly I was getting 13.5 MPG with stock filter and 14.5 with K&N. This is with a topper on it and unloaded otherwise. Bought the truck to haul 10,000 pound trailer so can't wait to see what it gets then!
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1969 GMC Wideside SWB 400ci/TH400/373/Disc Brakes/Leaf Springs
1992 Chevy C3500 Ext Cab Dually Silverado 454 TBI
2007 Chevy Corvette ZO6 427ci 505HP
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