Originally Posted by kev12345
i find it hard to believe the heavy 2500 cummins is more fuel efficient than the 1500 hemi's...
Kev, coming from someone that has owened both 07 Hemi and 13 Cummins... the Cummins by far gets better mileage. Even back in the day, I drove my Hemi to Arizona and back (Portland, OR) and averaged about 19.1 mpg on the freeway trip (didn't count the tank that was used to drive around Phoenix). 6 months later, I flew to LA and drove home with my dad in his 08 Cummins... We filled up in North LA and drove the 1000 mile trip to Portland.. Got home and still had over a 1/4 tank on our 2nd fill. Averaged about 21.8 straight freeway on that trip.
My 13 Cummins avearges about 16.8 per tank and I drive very little freeway these days and if I am on the freeway, its during rush hour so im rarely over 60 mph for longer then a few miles before I drop down to 30-45mph.