slyws6

...on a 2000 2500 ECSB with the 6.0L, A4 Current MPG between 12-13hwy
...and on a 1999 1500 ECSB with the 4.8L, A4 Current MPG between 19-20hwy

Thanks!

slammedS10

maybee expect 1-2 mpg tops. But it all depends onyour driving habbits

slyws6

That sucks I was hoping for more than that. I've heard some people were running around in 2500's getting 18+mpg

SSlow 4.8

iTrader: (4)

well... wait4me says his fuel tunes can get at least 3mpg better. I saw about that when he did mine. You should talk to him... hes a sponser to the right--->

He also has it so where u can have your fuel ("economy") tune and than when u hit the tow/haul *** button it will be programmed differently as far as the transmission goes... his fuel saving tuning goes as far as fuel mapping for specific octane of fuel and transmission shifts.

cbrich

I get between 16 - 17.5 mpg on the highway in my 2500, I am trying acetone to see if I can get a little more out of it.

slyws6

lol don't waste your time, I tried Acetone in mine and on average I got 12.5-12.75 after I stopped using it the last two tanks have been 13.55 and 13.21 what's weird is that for some reason I thought before using the acetone I was getting 11.5-12.5

-Sly

1slow01Z71

iTrader: (36)

IF you enable lean cruise mode you can pick up 3-4mpg on the highway

TG02Z71

iTrader: (2)

I have heard about the lean cruise mode from LS1TECH and saw in numerous posts that it is not doable. Is there something in our PCM or ECM that is different than a F-body computer system?
I am going to eventually buy HP Tuners and was wondering of this lean cruise mode was even possible.

SSlow 4.8

iTrader: (4)

I am not exactly sure how Jesse programs for it... but I am seeing 3-4 mpg on his tune. And ya, i have also heard lean cruise mode wouldnt work on our pcms for some reason.

JERRY2500

i retuned a buddy HD and he went from 14 mpg to 17 mpg on the hwy. I've gotten has high as 19.5 with mine.