Paris, what you're saying would be true, except for environmental regulations. Vehicle makers have to tune their vehicles to meet certain environmental standards, not make the engine run the best that it can. With my Volkswagen Turbo Diesel I had 140 hp and 236 lbs tq, which is shown on the purchase documents and in VW advertisements. And the car was getting around 40 MPG driving up here in the foothills on two lane roads with very little traffic. After getting my Malone 1.5 Tune I took the car to a speed shop and had them put it on the dyno. It recorded 170 hp and 300 lbs tq. My gas mileage with the tune went up to around 43/44 MPH driving over the same roads as before. You can really feel the difference in performance, especially when towing. I tow a small trailer with my motorcycle or my ATV on it and often go over the Sierra Nevada mountains. With the Malone Tune I know which gear I use for different parts of the trip up steep grades (I have a 6 sp standard transmission) and without the tune I had to be one gear lower for that same stretch. I live in a county that does not require a smog check except when you buy and when you sell a vehicle, otherwise a Tune might be a problem, but as it is I'm willing to have the tune and just reverse it if I ever want to sell my VW, which I don't see happening for many, many years.