Liftdoctor: I do not claim 40%. I just said, the trucks do use more fuel. The application will determine the amount of fuel used. Like I said we have more than just one customer complaining. Yes I am not doubting some are claiming more fuel consumption than others. But the bottom line is? They do use more fuel. And in some cases I know, due to the application the trucks are being used in. The fuel consumption is definitely noticeable! Like I said, everyone wants to claim they have the cleanest running truck. But don't want to talk about fuel consumption. I even seen some manufactures take out a statement in their brochure. That the new emission trucks will lower your fuel consumption. After they are being questioned. Why are they spending more money for fuel? After they got their new fleet of trucks. Would like to see some real honest reports showing the differences between the older trucks and the newer trucks? Truck for truck! Would really help clear up a lot of unanswered questions. If you know anyone that has a proven report of 3%? let us know? Speaking words is cheaper than buying fuel