want better mpg, check your tire pressure!

[jeep-N-montero]

Lately I have been noticing that acceleration and mpg has been a bit more dismal than usual and kept thinking I needed to check my tire pressure, last night I finally got around to it and all 4 tires were 6-8 psi lower than when I had them mounted in July. Filled them back up to 35psi and made a world of difference, on the drive to work I could feel the ride is a bit stiffer but can definitely tell rolling resistance has decreased and steering is more responsive.

 

[freewayross]

True I keep 48 psi all around on my 33' BFG AT.

 

[jeep-N-montero]

True I keep 48 psi all around on my 33' BFG AT.

48 psi??

 

[montypower]

I run near 50 psi on the road as well. It adds about 1 mpg compared to 32psi on the road.

 

[BulletHead]

i ran 42-45psi on all Michelin LTXs and at 95k miles (I bought the vehicle new), the tires were still passing state inspection easily. I'm convinced the 32psi max is required by the tire lobbyists.

 

[jeep-N-montero]

i ran 42-45psi on all Michelin LTXs and at 95k miles (I bought the vehicle new), the tires were still passing state inspection easily. I'm convinced the 32psi max is required by the tire lobbyists.

Those are also a load range D or E tire and are designed for higher pressures. And 32psi is not the max nor the recommended rating for the Montero, the factory specs are lower than that and are as such for ride comfort.

 

[Swank Force One]

We run 48-50psi in ours as well.

 

[Eric M]

Yea, 48psi sounds pretty brutal. I have LRC tires and just follow the placard.

 

[freewayross]

48 psi??

Yes on the tires it says upto 50 PSI :smiley_drive:

 

[Swank Force One]

Worth mentioning that we have the heavy rated Duratracs. Truck seems to ride awesome from our standards, but keeping in mind that Cherokees were our "comfort benchmark" prior, the bar is pretty low.

 

[JohnnyBfromPeoria]

You might want to chalk your tires to see how much of the tread actually touches the ground at various pressures. It's not just what the tire can hold, but how the pattern contacts the ground, unless you just want the center section to be the only part you're driving on. It's a function of wheel width in play with tire size and one size does not fit all.

John B.

 

[jeep-N-montero]

You might want to chalk your tires to see how much of the tread actually touches the ground at various pressures. It's not just what the tire can hold, but how the pattern contacts the ground, unless you just want the center section to be the only part you're driving on. It's a function of wheel width in play with tire size and one size does not fit all.

John B.

This is why I was questioning their higher pressures, last summer I did the chalk test and found 32-35psi was the best for my 33x10.50 km2's.

 

[Swank Force One]

Wear is even. At current rate they'll dry rot before the tread wears out.

 

[ManfromSnowyRiver]

I have never even heard of running tires at 50 PSI! At that pressure the tires could hold up vehicles many times the weight of the Montero. I used to run 28-32 with 31-22" tires, although I find for 35"+ tires 35PSI is better. I cannot imagine any improvement in gas mileage above 35PSI and ride would be simply brutal. There is a real cut off here. Consumer Reports and Mythbusters have both busted the idea of gas mileage losses for slightly low tires. 8PSI below 35psi might do it, but probably just.

 

[U.A.V.Nissan]

I run frontier 2wd with 33s Nittos at 40psi
Been wanting too chalk test it since


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