Going to try for a new tow vehicle

Bought a new RAM 1500 to tow the race rig last year. It gets about 8.5 mpg towing about 10,000 lbs of loaded trailer. With gas prices being what they are I want to go and see if dealerships are willing to deal on their RAM 2500's that they have in stock. I'm being told the diesel will get about 18 mpg empty and about 13 towing that same load. None of the dealers in my area have the truck with the 6.4 hemi, they are all diesel. I would drive it 90% to tow to the track. I can get about 40k in trade on the RAM 1500, maybe even 45k, they are still hurting for used vehicles. I figure 15k off list would be the deal to shoot for.

good luck getting 15 k off list won’t happen, I assure you.
Nowhere near that much markup