"The biggest difference between the Mileage XS and other "fuel economy" aftermarket products is we engineer these powertrain calibrations specifically for improved economy and scientifically verify the results." Superchips Mileage XS tests indicate up to 15% MPG gain depending on vehicle and engine type. Furthermore, aside from saving gas with Superchips Mileage XS, the unit is aimed to be price friendly as well. Superchips Mileage XS is the most "affordable access to the latest innovations from Superchips"

Squeezing energy out of a gallon of fuel for improved mileage is just as much of a science as making big horsepower gains. By tuning vehicle ignition, transmission shift characteristics and fuel injection, Superchips Mileage XS delivers up to 20% gains in fuel economy in diesel trucks, and 10% for gas-powered cars. Superchips Mileage XS also displays and clears trouble codes. Superchips Mileage XS can be recalibrated if changes to tire size and gear ratio are made.