This is a bit of a leap of logic from being green because you move 11 truckloads in 10 trips, albeit one I assumed myself when I started at Prime.But what you can expect is weight savings, which of course means fuel savings. If you want a fair comparison you have to take two identical loads, both weighing 45,000 pounds, and haul them over the same terrain with the same driving style. The lightweight truck is going to be almost 4,000 pounds lighter than the standard truck. So the lightweight truck will move that same exact load of freight the same distance using slightly less fuel.
I have driven three trucks, currently a 2014 non-evo condo cascadia, a 2014 evo cascadia, and a 2014 Eco (lw) cascadia. The evo was almost a full mpg better fuel mileage than the Eco, which was a tiny bit better than my non-evo.
I also spoke at length to a person on one of our dedicated accounts about fuel mileage. He was in instructor classes with me and had already gotten a condo a couple months previous. I was surprised when he said he was getting better fuel mileage out of the condo. Same routes, same freight.
I believe it now that I've driven both.
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Of course I agree with Old School. That dude knows his stuff. You seem to be having trouble understanding that moving less weight requires less fuel but that's a well understood fact.
Like I said, an individual driver will not necessarily see the better fuel mileage numbers on their screen. It's not as simple as expecting the lightweight trucks to average 8.3 mpg while the standard trucks average 7.9 mpg. Every truck is hauling different freight over different terrain using drivers with different driving styles.
But what you can expect is weight savings, which of course means fuel savings. If you want a fair comparison you have to take two identical loads, both weighing 45,000 pounds, and haul them over the same terrain with the same driving style. The lightweight truck is going to be almost 4,000 pounds lighter than the standard truck. So the lightweight truck will move that same exact load of freight the same distance using slightly less fuel.
So to say they did it "100% to increase payload" means you're not following the logic to it's proper end. In the end that increased payload is being hauled using the same amount of fuel as it takes a standard truck to haul a lesser payload.
OWI:
Operating While Intoxicated