Excuse my ignorance, but why would going lower gear not help? If I run 65 at 1450 I'm getting 300+ miles per fill up. So my thought was if i run a...
So I've got a 05 Kenworth t600 with a Cummins, 18 speed Eaton with 3.55 rears. Currently I'm getting about 5.1 to 5.5mpg at 70 running at...