That makes sense, mine has the e4od. Not sure what gear it has, what ever is stock in the 10.25 rear end.Mine both were single cabs and had zf5s, both got over 20mpg. One had 3.55s and like 32ish tall tire with a service bed, the other had 4.10s and 39” Baja TAs. Only towed with the service truck a hand full of times, momentum was definitely your friend.
I have been wanting to build a centrifugal oil filter system in my shed so I can start cleaning waste oil to use as fuel.