How much of a gain are you guys/gals seeing with EFILive? I've heard of some outrageous gains from people but it would be nice to hear it straight from the people that use it.

got mine from 16mpg @ 75mph on the freeway to 19mpg @ 75mph. city driving is around 16 - 17mpg This a ccsb with a large azz tool box in the bed LOL ... when I weighted the truck it tipped in at just under 7,000lbs with me and my tools in it.

Depending on the tune im running... I have seen up to a 4mpg gain(thats if i keep my foot out of it)

Anyone else?

I've only had it for about two months...i've seen a few highway trips with an added 2mpg or so. but most of the time the only thing ive gained is more trips to the diesel pump :D

I've seen 3-4mpg increases also. Depending on the amount of foot and the type of tune.

24 is the most I have heard from any tuner that I would even remotely trust. A lot depends on how fast you drive.

24.7 highest

13-16 average

tire size has a lot to do with it

i have heard my buddy was getting 35MPG that seems really high but he said he wasnt going off the computer actully dividing miles by how my gallons of fuel being put in the truck

most I've ever gotten was like 1 to 2 better, but only for a couple of tanks cause I just started to and more power once I learned enough to be dangerous.

With my OWN toying I've went from 15mpg freeway to 18.1mpg... Imagine if I knew what I was doing!! :)

@ 75 MPH I went from 17.5 to 19.5mpg. Highest was 20.9mpg. I pretty much average 19.5 all the time with mixed driving. Someday I will slow down to 70 and see what that does for me. All hand calculated which helped me correct the DIC to read correctly.