How do you all get 6.2s to 300K miles

[nycxjeremyy]

It’s all in the drag.
I had a buddy that lived here with a 1992 k2500 6.5. He replaced his bad turbo with a gm6. He has db2 ip. My 95 has gm6 and db2.
He runs 38X9 tires that measure at 36.75, my 37x12.50 tires are really 36.5 new and were worn down to 36.25” tall.
So we swapped tires for a couple weeks to see how the other ones feel and perform.
He lost 4 mpg. Mine, it made no difference.

But I noticed towing heavy and I don’t get any worse. I think the engine is nearly maxed on load efficiency.
12.5mpg if I drive moderately, 10.5 mpg with my foot on the floor (literally) from every stoplight until 5 over limit. Doing 70 mph hiway.


My gears are way worse than yours, 5.13 after everything.
My geared hubs (portals) eat a lot of mpg.
I never tried just doing 55mph. But many guys with hmmwv & hummer say slowing down from 65 to 55 adds 2-2.5 mpg. Your truck is slightly more aerodynamic than mine because of the sloped windshield, but your grille height is much bigger than mine plus your axles catch air mine doesn’t.
So I would think that wind resistance impacts you as bad as it does me.

At the end of the day, we all drive bricks
Its quite literally that. Bricks

The fact that we get the mileage we do is a damn miracle in itself, 454 bro gets 10 to the gallon, if not less