Originally posted by boyoconnor:
Tailgate up or down? This can help, my '68 C-10 used to get 3-5 better MPG with the tailgate down.
-Boyo
Good point! I haven't checked it both ways. I'm surprised it could make that much difference.
I will have to check the mileage again. It seems to be better lately, but right now my son has the tailgate removed to sand off the rust. That could be the key.
Thanks for the tip!