Good in Performance only
I installed the product my truck with 87oct and gain some power but no MPG, Switch to gas saver mode,did not feel any change over the 87oct. I finally put it on 91 Oct.and yesI felt a lot more power and better acceleration and torque, the only thing I have felt strange is that when I go slowly it gives me a weird squeal in transmission and I'm worrying a little. This product is very good in Performance Setup,for 87 and gas saver option I prefer let my truck in Stock Setup. IMOP.
I always had sluggish throttle response, I installed level 1 software and it made a nice difference. My overhead mpg always settled down to 14.2 after a couple hundred miles. After 250 miles on level 1, it is still ticking up and is at 16.7. I do not plan on using level 2 or 3, as this is a 99 with VP44 and auto trans. The only reason I bought it was to try to fix the sluggish throttle response, and since it did, I will leave it alone now.