I'm a little excited....I just bought a 2003 2500 duramax/allison combo....traded the hemi in on her.............what kind of milage should I expect to get????

Mine gets 16-17 pretty much all the time. Almost 20 on long trips at 65 MPH....but I can hardly keep it there since it's Juiced and seems like 80 MPH is its favorite...

Have a GMC 3500 D/A dually, just took a road trip and the average MPG was 19.8

18 in the city and 21-23 on the hwy. 12 Pulling 15K 5ver. Juice on Level 3 around town. Level 2 while pulling. Just started using B20 Bio and it seems as it has even improved...Jim03 2500HD CC/SB LT LB7 Juiced no/Attitude Isspro Gauges, Stock Everything else


If you can really call these trucks stock:ro)

I get consistant 18mpg in the winter and 21mpg in the summer. Banks 6-gun helped me gain about 1.5mpg. I run it on level 2 most of the time.

I average 15-16 per tank. Close to 20 on the highway if I drive sane.

I drive with a very lite foot though:uhoh2: :lying: :rotflmao: Your results may very;)

Normal around town - 17mpg
Highway - 22mpg
Heavy footed ):h - 16mpg

Welcome to the board.

Waaaayyy better than that hemi, a hunting buddy of mine purchased a quad cab hemi last fall, we split fuel costs and driving. My costs to drive the round trip to the hills and back was $27.00, his was $57.00, needless to say I ended up driving alot more than he did. He is currently driving his sister's sunbird to save on fuel costs, claims he can't run the truck and make the payments lol.