lmm mpg on 37?

[2006coalroller]

curious what you guys are getting for mpg in lmm running 37 trying to figure out if mines normal or need to change efi tunes only gettn 13 on highway

 

[Dudgy]

My old LMM got about 15 average driving it pretty easy. I had 3.73's though. 10" cognito, 37" mud grapplers on 22's. H&S Black Maxx, Banks CAI, 4" exhaust were the only mods to engine.

 

[2006coalroller]

i think its my tuning cuz i run close to factory rpm at 65 i had mini max before efi i got 15 as well so my buddy tuned me with efi so guess i better call rob or duramax tuner

 

[2006coalroller]

bump

 

[VeeAte]

factory rpm and a bunch more weight to get moving and keep moving, i doubt tuning will make it better

 

[Chevy1925]

Get a better tune

 

[blk smoke lb7]

I had a friend with and lb7 and yeah i know its not an lmm but he got 13 hand calc before head gaskets and head porting and afterwards 16.5 hand calc no other changes were made 37s on a 7 inch lift

 

[2006coalroller]

well at 65 i turn 1800 rpm pretty close to factory my 06 with 37 and 3:73 got 21 with a ppe so im thinkn it is tuning