New Tuner! Hypertech "Hypermax" for G35-G37!!
Having had this for a while now, I have recorded approximately 2mpg better fuel economy than before. I also installed a k&n drop-in at the same time, so it could be the combination of the two. But people here haven't noticed mpg gains from a k&n:
Before (city):
16.52
15.29
17.64
Before (highway, 85-90mph):
21.5
After (city):
19.66
17.35
Haven't made that same highway drive yet, so unsure about the mpg there. For the record, my Uprev tune yielded the exact same mpg on the highway as my stock tune, and I did not notice an increase in city mpg.
Before (city):
16.52
15.29
17.64
Before (highway, 85-90mph):
21.5
After (city):
19.66
17.35
Haven't made that same highway drive yet, so unsure about the mpg there. For the record, my Uprev tune yielded the exact same mpg on the highway as my stock tune, and I did not notice an increase in city mpg.
Having had this for a while now, I have recorded approximately 2mpg better fuel economy than before. I also installed a k&n drop-in at the same time, so it could be the combination of the two. But people here haven't noticed mpg gains from a k&n:
Before (city):
16.52
15.29
17.64
Before (highway, 85-90mph):
21.5
After (city):
19.66
17.35
Haven't made that same highway drive yet, so unsure about the mpg there. For the record, my Uprev tune yielded the exact same mpg on the highway as my stock tune, and I did not notice an increase in city mpg.
Before (city):
16.52
15.29
17.64
Before (highway, 85-90mph):
21.5
After (city):
19.66
17.35
Haven't made that same highway drive yet, so unsure about the mpg there. For the record, my Uprev tune yielded the exact same mpg on the highway as my stock tune, and I did not notice an increase in city mpg.

Besides that, with gas mileage, it's very easy to create variations unless strict controls are involved in the testing, so the results are suspect at best. I can easily see variations as large or larger than your results within my own driving without ever changing a thing.
Keith, again, you've got a completely different motor. I don't even understand why you are posting this in the V36 section. 
Besides that, with gas mileage, it's very easy to create variations unless strict controls are involved in the testing, so the results are suspect at best. I can easily see variations as large or larger than your results within my own driving without ever changing a thing.

Besides that, with gas mileage, it's very easy to create variations unless strict controls are involved in the testing, so the results are suspect at best. I can easily see variations as large or larger than your results within my own driving without ever changing a thing.

And I do know how to calculate gas mileage. These were entire tanks of fuel measured repeatedly under the same driving conditions and about the same temperatures. See the variations I recorded? It's the same, just shifted up.
I bought a Hypertech for my 2006 Grand Cherokee V6.
The HP stock is 210HP. Hypertech advertises +25HP/25ft-lbs.
You would expect a kick in the pants from 25 horses.
The programmer threw codes and the jeep was slower. They flashed my programmer.
Problems went away, but did not seem any more powerful than stock.
Sold my Jeep before I could do dyno runs.
Wish I could have saved my money.
The HP stock is 210HP. Hypertech advertises +25HP/25ft-lbs.
You would expect a kick in the pants from 25 horses.
The programmer threw codes and the jeep was slower. They flashed my programmer.
Problems went away, but did not seem any more powerful than stock.
Sold my Jeep before I could do dyno runs.
Wish I could have saved my money.
Every Osiris reflash is "custom"... All they're doing is cut n pasting preprogrammed values into your Tom file.. No different than any other big shop that sells Uprev online or even Uprev themselves
Yes, but you will still have to pay for tuning, either on the dyno at a protuner shop or via email with etunes. There is no "one size fits all" tune with uprev








