What tire pressure are people running to get maximum MPG?

The truck is still new to me, and I think the factory/dealership set the pressure at 55 lbs. I was thinking of increasing it to 60 or even 65 (I think the tire can easily handle that).

I have the Firestone Steeltex 265/75 R16's (I know... they still need some help filling up the wheel well, but it was the biggest I could get from the factory).

Thanks!

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2001 F250 CC Lariat LWB, 5.4L V8, 4.10LS
- Jeraco Deluxe Cab High Cap, color matched (expected soon)
MODS: Still busy figuring out where to start

 

Unless towing or hauling a heavy load, I run what the door placard "recommends". That is 55 front / 70 rear.

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1997 4x4 Expedition- 4.6L, true dual exhaust w/Ravin DI/DO, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 F150 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.

2000 4x4 F250 SD XLT SuperCab SWB- 6.8L, Offroad Pkg, Camper Pkg, 4.30LS, Tape & CD player, Remote Keyless Entry, Sliding back glass, tinted windows, 265/75R16 OWL tires, Smittybilt nerf bars & Line-X bedliner.

NoMo's site

 

After I posted this, I decided to go outside and check the pressure. Turned out the every tire was low! So I drove over to the local filling station and pumped them up to where they belonged.

The other reason I asked was that in my '97 ranger I found I got better MPG with 3 extra pounds of pressure (which was within the limits of the tire). I was curious if anyone else had ever checked.

Thanks!

Santa

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2001 F250 CC Lariat LWB, 5.4L V8, 4.10LS
- Jeraco Deluxe Cab High Cap, color matched
- Uniden 68LTW CB Radio/Wilson 1000 Mag Mount Antenna
- Trying to figure out what's next

 

I run 65 in mine.

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2k F250 CC SWB 6 speed 4x2 Diesel XLT Super Duty, Woodland Green
Power Mirrors, 3.73 LS, Captains Chairs, ARE tonneau top, rear privacy glass
TT Pkg, Class IV hitch, sliding rear window, running boards, mud flaps
265/75/16 AS OWL tires, am/fm/cassette/cd, rechargable MagLite
Clarion APA 5240 amp, Memphis speakers:Components front, 5x7 rear, 10"sub
SuperChip, Stepshields, Ventshields on windows, rubber bed mat
rugged liner bedliner on tailgate, quick disconnect jumper cables
unaFORDable (decal on tailgate) Western Diesel Turbo Brake (whoa boy)
Finally gauges!!: Pyrometer & Boost on the A-Pillar mount

 

65 in all four?

I think I'm going to try 65 in the front and 75 in the rear and see how it rides, handles and does on MPG. Those pressures are within the range of the tire.. so it should be okay.

After a while, I'll report back how it does.

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2001 F250 CC Lariat LWB, 5.4L V8, 4.10LS
- Jeraco Deluxe Cab High Cap, color matched
- Uniden 68LTW CB Radio/Wilson 1000 Mag Mount Antenna
- Trying to figure out what's next