i have the hypertech on 87 and running 34" toyo mt and a teraflex 2.5 coil lift and getting avg. 16 to 17 mpg with auto

 

I am installing the premium fuel tune as I type now to see if there is a difference to justify the $59.50 fill up.

 

Goofas7070,
Do you have any results, Good or Bad we want to know

 

I have the Pro comp / Hypertech, been running it for about 6 months now. 35" tires, 2.5" teraflex coil lift and 1 " body lift with 4:10 gears

Played with both 87 and 91 octane tunes.

87 has a bit more pep, better mid range power, bottom end is about the same. slightly better highway cruising power not as much need to shift down to 5th gear on inclines. peppier 6th gear slightly.

91 octane, much better bottom end. great midrange, pulls strong to the red line. Far better highway cruising, hardly need to gear down for inclines, far better 6th gear driving. I get more KM's per tank on the 91 octane. Sometimes it justifies the extra cost, sometimes it doesn't depends how and where I drive. IT runs much much better with the 91 tune, idles better, starts better, sounds better.

for off roading I would prefer teh 91 tune, for daily driving either are good. prefer the 91 for the sake of better freeway power and a few extra KM per tank

really wish it did the idle control function.

good product, does what it says, doesn't glitch, customer service is excellent.