Johnr: Understand how the emissions work & the differences in the older trucks and newer trucks. One of my family member own a large propane company on the east coast. But I also know for fact! The new computerized trucks are using more fuel. Bottom line more fuel more $s. When you replace a fleet of trucks, and the customer can prove with his bills. He is using more fuel. Not just one customer! Dealers should be told & sales people should be told, to be able to explain the reason why! Manufactures know it & should list it? I think they do list, electric truck batteries are rated to run 6 hrs in a normal shift. If you want to talk about cars? Don't they list rated miles per gallon on the sales stickers? If they listed the information on fuel consumption. Like on cars? I wonder if the purchasing agents would be interested it? ETS