I have a 97' 150 lariat and that I bought used and it has
265/75 r16 instead of the stock 255/70 r16.

These tires will hold up to 50 psi. The question is how much air should I put in the tires to maximize fuel efficency?

Thanks

 

look at your sticker on the door jam, it should be around 32 psi.

 

The higher the pressure you can handle, the higher mileage you will get. Unfortunately, when you pump up you pressure you get some weird wear patterns. I usually run my tires between 35-40 PSI and don't get any strange things happening. Basically it's a comfort preference.

Bob

 

Sounds like you have LT265/75R16. C load rated, 6 ply tires.

Start by putting 44psi inthe front, and 40psi in the rear. When running a full load pump the rear up to 50psi. Watch for wear, listen for hughway noise, adjust to your personal ride handling/comfort. I know one guy who runs them at 30psi empty just so they don't howl on the highway.

 

That's how I have mine. Seems to be the best compromise for all around driving.

 

i have mine in 30 PSI regular driving ...
in deep snow i go low as 2 PSI..
Also it depends how high over sea level you are,, the higer you are less air you need.

 

I always forget to check tire pressure regularly.
Pumped up tires last week.
2.2 Bar, don't know how much psi that is.

 

hey fellas,

i'm with mitch and sagittarius, pretty much the exact same pressures. i guess great minds really do think alike....lol, Rich.

 

I put 265's on my 97 f150, replacing the stock 255's. I run mine at the recommended pressure stamped in the tire. And onc upon a time I read in a Chilton's manual over in-inflating 2-5% will gve you about 1mpg better.