Over a 1 MPG increase AND on 87 octane!
I was a bit skeptical of this tuner, since a lot of them have huge promises, but I got a great price on it through AutoAnything and bought it. I have an Escalade with a 6.0 V-8 and RWD that usually gets 17.4 MPG on the highway at best on our road trips. I got as high as 18.9 and even through a 3,800 miles road trip driving on the highway, city traffic and up hills and mountains, it still averaged 17.3! The cost savings of using 87 octane plus getting better fuel economy were well worth it!
Hypertech is very good but it's not a custom tune.
This programmer is very easy to use and makes a noticeable difference in about 5 minutes. To get the most out of the programmer you need to use the premium fuel tuning and adjust the shift points and shift firmness. All are very easy to do but might take a few attempts to get the shift points right. The instructions regarding shift points and rev limiter are not the greatest. It states that you need to raise the rev limiter the same amount as the shift points. I raised all shift points 200 rpm and didn't need to adjust the rev limiter at all. If you aren't hitting the rev limiter there is no need to raise it. Raising the rev limiter is a good way to blow your engine. I tried using it with an aftermarket MAF and I kept getting DTC's regarding lean condition. So if you are doing any more than a cold air intake and cat-back exhaust you need a custom tune. If you are only looking for impoved fuel economy this product is probably not for you.