theres always that one guy on the forums.
This was a apples to apples comparison, same route everyday to work 120 miles round trip. Highway and city mix. Before tune on this trip I got 14.1 -15.6 mpg. Same trip after the tune I got 19-22 I can post pictures of the cluster if you want! I Dont sell anything I was just telling him.
Diablo lew tunes, arent a performance chip or a "one setting fits all" tune. Its a program you log data and send to him and he creates a specific tune for your truck using data collected by user. (knock retard, air fuel mix ration, shift timings anything and everything). He changes everything from A-Z to make the engine more efficient. With the correct add ons to your truck he can tune it even better. Lots of people have had similar results to me but most drive with a heavier foot since it has more power but drive it in normal use and you will get similar results. Im not telling the guy he can expect 22 mpg like me by any means as for the environment plays a role in that but if he lives in oklahoma I would bet $100 on it he would get the same mileage as me!
Tires are toyo open country 33x12
http://diablewtune.com/
do your own research.
here is one under testimonials i found
MPG: Before:12.8mpg, now with tune:17.1mpg (wow!)... 0-60 2WD: Before: 8.2seconds (bone stock), now with tune: 7.8 flat... I also run a few dirt drags on a 200ft dirt strip... Best 0-60 in 4LOW has been 5.4seconds! Awesome job man!!
– Codi W.