I installed the AirDog and right away the engine [Cat C15] was smoother. My fuel mileage went from 5 to 5.8 mpg. I run the same route every day, so there aren’t any other factors that would have affected the fuel mileage. I am very pleased with the quality of the AirDog system. Best of all, it’s made in the USA.
Jason H.
Wooster, OH
