Poor fuel milage need help

[adsm08]

Most tires take 40 psi these days due to how long they last look at your tires and see whAt it say it will most likely say 44 psi max so don't just open your mouth I worked for ford for 4 years I use to set tire presher to 45 All the time and not ones died yet

Um, over-inflation to the level that you are suggesting will reduce the tire's life by wearing out the center of the treads much faster.

I had a buddy with some General Ameri4GS (Yes, I know, terrible tire to begin with and I teased him mercilessly for it) on his Civic. He made the same mistake you did and filled them to the tire's capacity, not the vehicle spec and had one blow out on him on day. Didn't hit anything, didn't scrub the side and throw a belt, it just blew from being over-inflated.

 

[fordrocks1986]

Well I've never had any of these problems and I did tires for ford and I never had a customer come back cuz of a blow out yes your tire can wear wrong but your tire can wear wrong from bad roads bad dampners out of alinemint not rotateing them not haveing enough psi and other stuff I tow a 7000 lb trailer and my truck has 45 psi and still no blow out so it's up to you how you want to have your tire wear and you have to take the good with the bad

 

[adsm08]

Ok, if you are towing a large trailer it is appropriate to pressure up your tires a bit, around their rated limit. I have problems believing that you have ever done tires professionally though, since anyone who has done it for more than a day would know the number on the door plaque, and not the number on the tire, is where it should be set for normal driving.

 

[chazzone]

Well I've never had any of these problems and I did tires for ford and I never had a customer come back cuz of a blow out yes your tire can wear wrong but your tire can wear wrong from bad roads bad dampners out of alinemint not rotateing them not haveing enough psi and other stuff I tow a 7000 lb trailer and my truck has 45 psi and still no blow out so it's up to you how you want to have your tire wear and you have to take the good with the bad

Calling B.S. on this.

This guy has no idea of what he is talking about, and I'm calling him out.

The first clue is that he is towing a 7000 lb trailer on a truck rated at a max of 6,000 lbs.

Not safe or smart.

He MAY have worked for Ford, but that speaks to more of why most of us chose to work on our own trucks instead of taking them to a dealership where some kid that doesn't have a clue can get his hands on them.

DO NOT over inflate your tires. Use the rating on the vehicle for a basic guide. This will give you the best all around wear and handling. If you are adding extra load, then there are guidelines to the amount that you add for additional weight, or you can do the chalk test and fine tune the tires for your specific load.

 

[litlred]

My Dakota tires say 44psi, there good year wrangler, I personally would go with what the tire recomends.Some tires are built different than others, just because your door recommends 32 or 35 or whatever doesn't make it right. A 90 model is 20 years old, your tires are much newer, research has learned a lot in 20 years, always go with what the tire manufacturer recommends. That's just my 2 cents.

 

[adsm08]

My Dakota tires say 44psi, there good year wrangler, I personally would go with what the tire recomends.Some tires are built different than others, just because your door recommends 32 or 35 or whatever doesn't make it right. A 90 model is 20 years old, your tires are much newer, research has learned a lot in 20 years, always go with what the tire manufacturer recommends. That's just my 2 cents.

Yeah, the tires haven't really changed too terribly much in the last 30 years or so. Not since we moved away from radial bias ply tires.

If you guys would read the words around the number you are claiming to be the gospel truth about how much air should be in your tires you would notice that it says

A) that is the maximum the tire should be inflated to

and

B) to consult the door plaque for proper inflation.

Tire pressure can be adjusted to match driving condition, like driving in loose gravel or on sand, or for towing a heavy trailer.

The tire manufacturer doesn't know what the tire is going to go on, they just know what they have tested it to and where they determined it is safe to inflate it to. That by no stretch means that they can tell you the optimum inflation for the vehicle you are going to use it on.

If you really really really doubt your door plaque, go ask the VEHICLE manufacturer. They will occasionally revise the settings, as with the late 90's Explorers, and the dealer can tell you what the latest setting is.

Also:

 

[litlred]

Okay, even chilton says to use the tag on you door, so I guess I was wrong. But checking with Ford is still a good idea.

 

[adsm08]

But checking with Ford is still a good idea.

Yeah. They do change it from time to time. That was actually part of the problem with the Firestones a few years back. People complained about a rough ride so Ford eventually said to put the tires down to 29 PSI but then people wouldn't keep up with the tires and they'd get down to about 15 PSI, over heat, and blow out.

 

[kimcrwbr1]

I just have to giggle alot of energy spent on a non issue at the end of the day you will have the pressure where you want to be anyway I go by the tire the manufacturer give you the max and the door give you recommended but the kick test works for me if one gets low i make them all the same about 32-35 works for me I suppose you could run it over sand and see if the tread is cupped or bulged it all depends on the weight of the vehicle and if you really want to get anal the rear should be different than the front from the different load factor but I have been using 35 max for 30+ years with no issues. The only reason you rotate from front to rear same side is the steel cords get stretched from braking and switching sides can break the cords

 

[fordrocks1986]

Calling B.S. on this.

This guy has no idea of what he is talking about, and I'm calling him out.

The first clue is that he is towing a 7000 lb trailer on a truck rated at a max of 6,000 lbs.

Not safe or smart.

He MAY have worked for Ford, but that speaks to more of why most of us chose to work on our own trucks instead of taking them to a dealership where some kid that doesn't have a clue can get his hands on them.

DO NOT over inflate your tires. Use the rating on the vehicle for a basic guide. This will give you the best all around wear and handling. If you are adding extra load, then there are guidelines to the amount that you add for additional weight, or you can do the chalk test and fine tune the tires for your specific load.

wow calling bs lol well first off i have a f 150 5.4 not a ranger that is rated to tow 9200 max says it right in the book and im not just some kid turning wrenchs i went to school for ford and picked up a few things here and there and tell me how is it over inflateing if your tire tells you to put it no more then what it says and the door guide well that is for the tire ford provides if you put an after market tire go with what the tire says cuz the door guide didnt make the tire and neather did ford the componay made them to work at a set psi not what your door says

 

[Big Jim M]

I have found the door stickers are telling me a certain pressure that my GF will enjoy riding around with.. However the tire tells me what the maximum load on it is and what the pressure required for that maximum load is.
So I am careful to keep the pressure near the door sticker for most driving and when I load her up I put the pressure up to the maximum. This is for not only my 1/4 ton vehicles but also for my 1/2 and 3/4 ton ones.. My wifes new 3/4 ton suburban comes with a door sticker asking for 80lbs in the rear tires.. TOTALLY out of the question! So it gets 45lbs and we are happy to ride in the thing..
Big JIm

 

[Quartermile]

Easiest and cheapest way . . .new sparkplugs with correct gap, new fuel filter, clean air filter, tire pressure 30-40 depending on type of tire and load being hauled, and use 91 octane fuel. 87 with ethanol is cheaper, but the 91 will pay for its self in the long run