Correct tire PSI?? What do you guys run??

[1965coupe]

Okay, this is the first car I have ever owned with tire-pressure monitoring..

The stickers all over the door jamb suggest 32 PSI for the tires, although the sidewalls say 44PSI max..

I want the best mileage, and I don't want the TPM light to go on.. I could care less about ride quality..

What is the best pressure for the tires? They are the 18" aluminum rims with BFGoodrich tires..

 

[kooldawg6]

For everyday driving I wouldn't go any higher than 33 PSI.

Taken from tirerack.com
Disadvantages of Overinflation

An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more easily when encountering potholes or debris in the road, as well as experience irregular tread wear. Higher inflated tires cannot isolate road irregularities as well causing the vehicle to ride harsher and transmit more noise into its interior. However, higher inflation pressures reduce rolling resistance slightly and typically provide a slight improvement in steering response and cornering stability. This is why participants who use street tires in autocrosses, track events and road races run higher than normal inflation pressures.

 

[Fourth Horseman]

This is just my personal belief, so don't take this as the official line, but I prefer slightly higher tire pressures. I find it helps with road feel and also to tell when I'm reaching the limits of adhesion. On my Marauder I run 35psi in front and 40psi in the rears. On my Mustang I've been running 35psi on all four. I plan to experiment with those pressures a bit to find a good fit for my Mustang.

All of that said, you certainly will not go wrong sticking with the recommended 32psi, and I would not recommend going lower unless you're at the track or something.

 

[07gtfolife]

I run 25 psi and just hit the reset button everytime I get in the car.

 

[harrison]

Okay, this is the first car I have ever owned with tire-pressure monitoring..

The stickers all over the door jamb suggest 32 PSI for the tires, although the sidewalls say 44PSI max..

I want the best mileage, and I don't want the TPM light to go on.. I could care less about ride quality..

What is the best pressure for the tires? They are the 18" aluminum rims with BFGoodrich tires..

For safety and tire wear, don't mess with the pressure. 32 is the number and a pound either way won't matter but why change it?

 

[kooldawg6]

For safety and tire wear, don't mess with the pressure. 32 is the number and a pound either way won't matter but why change it?

For everyday driving I agree. However, track driving(be it drag or road/rally racing), tire pressure can/will be changed slightly to gain advantages the stock pressure can't provide. They should be returned to recommended pressures before resuming street driving..."for safety and tire wear".
All depends on driving conditions and driving style.

 

[Marine One]

I'm running 32 psi as well. I've found every car to be different.

 

[V. Barbarino]

My car was in the shop 2 months ago, so I'd assumed when they rotated the tires they checked the psi, well yesterday I checked them and they were all in the mid 20's. Not sure how they all got that low, so I filled them up to 32 hot, need to recheck them when cold. But the car is so much better to drive now.

 

[sohcman]

Sticker says 35PSI.
Dealer set to 34PSI.
Tries worn down in CENTER only.
Dropping to 32PSI on next set.
90% highway driving.

Wonder why they recommend 35?

SOHC

 

[bigcat]

Sticker says 35PSI.
Dealer set to 34PSI.
Tries worn down in CENTER only.
Dropping to 32PSI on next set.
90% highway driving.

Wonder why they recommend 35?

SOHC

is that for the V6 only? my GT sticker says 32psi.

 

[V. Barbarino]

My GT says 32.

 

[Marine One]

At 18,000 miles my tires are wearing better than on any of my previous Mustangs. I've been running 32psi.

 

[kooldawg6]

At 18,000 miles my tires are wearing better than on any of my previous Mustangs. I've been running 32psi.

Near identical mileage for me, but at 33 PSI. I see nearly no wear on the outside edges on the fronts, whereas my other stangs would be looking shabby by then.

P.S. I don't even rotate mine...should, but don't

 

[sorceror]

Tire pressure depends on several variables (including, but not limited to: temperature, wheel size, weight), but you do NOT want to inflate to the max PSI unless you will be carrying excessive loads. It's best to follow the recommended PSI setting which is usually inside your doorjam, except where you will be going into non-stock sizes for your wheels.

Here is a good link to read up about tire pressure:

http://www.discounttire.com/dtcs/infoAirPressure.dos