6.4 litre HEMI vs Cummins

samhain7 wrote:
Hi all
Just upgrade TV from a Dodge 2500 6.4 litre to a 2500 Cummins
Looking to see if anyone else made this change to share your experiences on gas mileage.
Did the cummins make a difference in regular driving?

Congrats on the upgrade. Unless you bought it today would this question not automatically answer itself for you in very short order? Possibly immediately by using that fuel mileage thingy that comes on virtually all newer vehicles or some simple math after running through a tank of fuel?
(If you’re asking about mileage after breakin on a new vehicle, I understand, but you didn’t ask that and there’s probably 1,234 Cummins fuel mileage threads on this forum alone and 12,345 threads about it if you include other popular internet opinion sites.)

He!! There’s one on the front page right now live and in person with the opinions of info you requested.