Are you still running humvee rims? If so 65 psi sounds a little extreme, maybe do the chalk test. Most of the humvee rims are stamped 55 psi max.I have had the Cowdog on the road a little over 3 years now. 4 years ago when I bought the H2 wheels off Craigslist. They had BFG all terrain tires on them with reasonable tread. Except they were 2007 or date coded. I have needed new tires from the start but life kept eating the money needed to get them. Maybe I have too many projects as well?
Anyway with full summer here again I have been hesitant to drive the truck much above 40 mph. The old tires at 40 psi were rock hard, the steering was very darty if that is an actual word and the ride not pleasant. I put other things on hold and got a new set of shoes last Friday. Loud range E. At 65 psi this truck is now super smooth on good pavement and enjoyable on broken up back roads.
I did 300 miles today of mostly open highway 70-75 speed limit. 2 psi of boost with 650° EGT at 75 mph. This thing just eats the miles away now. I’m still waiting for a few parts to get shipped so I can finish the passenger side swing away gear holder. Once that is done. I think it will finally be ready for an Overlanding weekend trip once the weather cools a bit and I save some fuel money up.
I have no clue what mpg I got blasting along like that. I will fill up this weekend and hopefully it won’t be too bad.