Nothing new here Bro. I
Nothing new here Bro. I recorded 22 mpg highway consistently driving a heavy 3/4 ton(8800 GVW) Dodge 2500 Cummings Turbo D. NO OVERDRIVE, 5 SPEED MANUAL TRANSMISSION. I increased the mileage by changing rim & tire size, installing running boards, hood damn, window and headlight wind deflectors. I further increased fuel efficiency by changing out the factory filter box and increasing the exhaust pipe to 4 inches. And that was in 1997...