15 more PSI = 7% better MPG

[MetroMPG]

Please cite the source of evidence that over-placard inflation = center wear.

[Daox]

I've never had abnormal center tire wear in years of over inflating tires, even over the max psi on the tire itself. To make sure I've even measured my tires with a caliper from time to time.

[gone7]

To gain evidence, just contact any tire dealer, or check with any tire association. Also, basic automechanics texts clearly have example pictures to help educate.

[MetroMPG]

As I thought.

[gone7]

As I know, and science confirms.

[California98Civic]

Originally Posted by ACEV

As I know, and science confirms.

All hail Oz.

[RedDevil]

Originally Posted by ACEV

As I know, and science confirms.

Science is not aiming at keeping results secret. Show me your source. I bet there aint any.
There is no reason why a good quality tire would wear uneven under normal conditions and pressure that does not overexceed the max pressure by a wide margin.

Without proof you will convince the public of the opposite of your claims.
I will go out right now and add a couple of PSI to my tires.

[edit] 3 out of 4 had sagged a few PSI below what I put in before... so thanks for making me do this!

One tip though for anyone raising their tire pressure; take small steps at a time. And when you use your own small electric pump, wait between pumping each tire. The compressor gets quite hot and could easily burn the hose or melt the plastic housing, esp. when you go over 40something PSI.

[mcrews]

ignore the man behind the curtain......

[mcrews]

Originally Posted by ACEV

Not really. The purpose of getting better fuel economy must be coupled with getting useful work done. (The best fuel economy is probably a human-powered bicycle or similar. And that would be pretty useless work.)

If anyone is trying to get better economy, and he is driving by himself in a vehicle with more than one passenger space, he does not understand the concept of real energy savings to begin with. We are then just playing around with little bits and pieces of the puzzle. Interesting maybe, but not particularly helpful over all.

After all, don't people go to a lot of extra work to make their cars more aerodynamic? That just usually adds weight. It would be far better to shrink or expand the vehicle based upon space needed.

If one is not going to do that, then calculations of weight when adjusting tire pressure are a very reasonable part of the formula. Today I might just be driving myself, but tomorrow I might be taking the family and a full car of vacation stuff on a very long trip.

We can no more ignore weight then we can aerodynamics or rolling resistance or time or speed or any other part of the equation. Weight will always play a part in the whole discussion; especially when considerations of tire wear are concerned.

BTW, it is actually an eco-mod forum.

hummmmm.........
must be the really new & expensive cars that have that button......
We are talking factual reality here....what are you talking about.?

[gone7]

I'm always amazed at those who will not even take the time to search the same Internet they problably have access to 24/7. In just a few minutes I found:

Experts:
More About Larry Carley:
Tire Industry Association | Tire Industry Association
http://www.tirerack.com/tires/tirete....jsp?techid=72
Tips to controlling inflation pressure

As one says, do not go by the max pressure stampted on the side wall. The setting of tire pressure is not what it is there for. The auto manufacturer is the actual standard for tire pressure.

If one wishes to attempt up to 4 psi over, then they must decide on the risk factor. That is determined by a new set of tires run until they wear out, the cost of replacement, and then comparing that to the mileage rating and the experiece on the road during those months of use.

Goodyear states "Over inflation increases stiffness, which may deteriorate ride, and generate unwanted vibration. Over inflation also increases the chances of impact damage." There are a myriad of common sense considerations to make and it does not take a degree in rocket surgery to understand. My two years in auto mechanical training showed me certain simple facts, and I use those on a daily basis, and they have never let me down.

I know that just vibration alone is one of the single most damaging things to happen to an automobile.

The bottom line is to try and see. It is a free country. You can do as you like. But let us know the results after that 65,000 mile warranty runs out. Until then, it is all conjecture.