Originally Posted by hankgs
I HAD it and stupidly let it go... a 2002 Dodge 2500 cummins/auto trans with an exhaust jake/
I was getting 25mpg with a 3/4 truck- I NEVER got that with my 2009 4 banger Tacoma 4x/5 spd.
That's a lot higher than I got with a 1999 4x4 Cummins diesel, 3/4 ton. I think I got 21 or a bit higher on long highway drives, but definitely not 25. YMMV, as always...