These are additional ideas that we use:
Michelin wide based singles XDA Energy and Michelin XZA Steers
Synthetic oil
Start and stop like you have an egg between your foot and the throttle
Watch where we stop pick truck stops and rest areas at the top of the hill not the bottom
Look at your truck Do you have a bug shield? Do you have sun visor that blocks air?
Is there anything that can be removed from your truck that blocks air?
We trimmed our mud flaps down to the size of our wide based singles
Buy the flow through mud flaps
move the license plate if hanging down in the wind
Dont idle
Get pre pass and ez pass
use LDWS as an aid to keep the truck driving straight and not wobbling in a lane
Engineers at catipillar state that fuel mileage will be gained at speeds lower than 50 mph by decreasing rolling resistance. to increase fuel mileage above 50 mph you must decrease wind resistance. They also say synthetic oil in the engine does nothing to increase fuel mileage at any speed. But synthetic in the transmission and rearend (of the truck) will help fuel mileage at speeds 50 mph and lolwer. Got this off of the CAT website