what are you getting for MPG on your duramax?

ok im in the wrong forum but ill say it i might be a moron but wat fuel milage am i getting .
27 gallon tank. factory tire size 245/75/16 im running a 285/70/16 now put 26 gallons of fuel in this morning trip milage was 348.6 wat that come out to .
 
if i can stay out of it i normally get around 375 or so miles to the tank in my truck.

it has a triple dog programmer with the tire size adjusted and for some odd reason it gets the best mialge on stock but that might be because i tend to stay in it alot more.
 
Better MPG ??

I have a question for the Duramax guys what is a good programmer or box to help with mileage?? I know a guy from church and he is mainly concerned with MPG and not so much as the HP. His trucks are an '04.5 and '05 they are 4500-5500's range so they are larger trucks. He was wondering so no place better to ask. :thankyou2:
 
02 dodge4x4 5.9 said:
ok im in the wrong forum but ill say it i might be a moron but wat fuel milage am i getting .
27 gallon tank. factory tire size 245/75/16 im running a 285/70/16 now put 26 gallons of fuel in this morning trip milage was 348.6 wat that come out to .
Click to expand...


You got 13.41mpg to that tank. Just take the number of miles traveled (348.6) and divide it by the number of gallons 26.
 
rollin from cheyeanne wyoming to home (kansas city) on my big efi tune runnin 80-85 the whole way i averaged 19.6
 
17-18 average....19- 20 if im really really nice to her or take long highway trips
 
22.3 highway hand calc with the 550 tune in. And 15-18 combined city/highway with the same tune. With the LBZ the LB7 never has the trailer unhooked but with the 48' six horse slant we get about 13-16 on the highway
 
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