does the predator, or any tuner, improve gas mileage? I know their 'fuel economy' setting, 60hp I think, claims better mileage. but whos got them and does it realy improve fuel mileage and how much does it improve it? also does the predator allow speedo adj for different tires and gears?

 

I can't speak for the mileage of others, it varies wildly by PCM code. Some PCM codes do better than others. It increases it by giving you more power by changing the fuel map when the turbo is spooling, therefore reducing the need to use the accelerator pedal as much.

No, it does not adjust for different tires and gears. Here's the spec's:

http://www.motorhaven.com/customer/home.php?cat=38