My wife and I make an annual trip for business and to see relatives. This is an 800 mile trip one way. Before installing the AquaTunePlus system, I had to re-fuel three times to make this trip. Not this year! I re-filled only ONE time; I repeat, only once! I’m so glad my brother recommended your system to me. Also, he was absolutely right, the hp is great and the exhaust has a totally different sound and smell to it. It’s real throaty now and a sweet smell comes out of the exhaust. Your product is awesome, thanks again, B. L., Alaska (This is an ’05 Chevrolet Avalanche V-8, 5.3L Vortec engine).