Not sure which 2008 Mercury Mountaineer Performance Chips & Programmers are right for you? We have over 3535 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Using the max setting for higher octane fuel, I did notice a change of almost 2 mpg via my trucks OEM display. I also did notice a slight increase in accelaration as well.However, it could have been made a little sturdier. The circuit board inside moves around a fair amount so when I was flashing the computer on the SUV it lost it's connection. Which is how I discovered the unsecured innards of the unit. In short, WHAT A MESS OF THINGS THAT MADE! ! ! Because of that, it also created an error code that I had hard time getting rid of and had to disconnect the battery and reflash a couple of times.After all said and done, I rate it at a B-, includes value added.This is my $.02" —Hugo G from Livonia, MI bought a Hypertech Max Energy Programmer for a 2008 Mercury Mountaineer.