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Better fuel economy is a very hard thing to guarantee with any aftermarket product. So many things come into play. While tuning CAN help out in this aspect, it is not a guarantee. Normally, poor fuel mileage is associated with stuff like worn injectors, weak HPOP, boost leaks, and last but not least, the person sitting in the drivers seat.
The best thing to do on your journey for better mileage is to pick up a scan tool which can watch live data. We offer one call the Infinity which you can find HERE. Tools such as this will show you the weak or failing points of the engine. They will also help you find bum sensors and test things like your injectors. Do some research and you will see that a scan tool is vital if you are really wanting the best mileage.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.