Superchips' Mileage XS Diesel Tuners for Ford, GM and Dodge diesel trucks are engineered exclusively for fuel savings in full size diesel pickup trucks. This product is engineered to reduce the cost of ownership while meeting emission standards. A comprehensive approach to engineering the Mileage XS targets five key areas: fuel injection and ignition, throttle position optimization, displacement on demand, transmission shifting and torque converter strategies. These areas are optimized across the entire RPM band.