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Author Topic: Do higher tire pressures help mpg? Back to Topics
iaqxf

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Ohio

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Message Posted: May 19, 2011 6:29:26 AM


.............................................

tires at 10psi = 3.7% increase in consumption

tires at 30psi = 1.2% increase in consumption

Control, 35psi (manufacturer recomendation)

tires at 40psi = 6.2% decrease in consumption

tires at 60psi = 7.6% decrease in consumption

From Mythbusters test....


[Edited by: iaqxf at 5/19/2011 6:31:29 AM EST]
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Nuzan
All-Star Author Nevada

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Message Posted: Nov 23, 2014 3:19:40 PM

Yes
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JohnCur
Sophomore Author New Jersey

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Message Posted: Nov 19, 2014 2:31:24 PM

run at 35 vs 32 don't realnotice much improvement
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HideMKE
Champion Author Milwaukee

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Message Posted: Nov 19, 2014 12:40:10 PM

yes... but just 5-10% higher psi
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FrankLee1
All-Star Author Minnesota

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Message Posted: Nov 19, 2014 11:40:55 AM

pinbuster's post is not accurate.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Nov 19, 2014 4:24:19 AM

Sure it might boost your mileage a little bit but the tires aren't going to last as long and they aren't going to wear even and that can cause problems. Also if the tire is at max when it's cold the pressure increases as your going down the road and the tire is warm so it then could cause a blow out that could result in an accident.
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GasMiser718
Champion Author Detroit

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Message Posted: Nov 16, 2014 7:53:25 AM

No I think it the opposite. Manufacturers specs that what I follow.
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Floridaman2013
Champion Author Florida

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Message Posted: Nov 12, 2014 8:21:17 AM

With the new larger size tires now on most SUVs and trucks, my tire pressure is kept at 45 PSI. Better handling, mileage, tire wear. Just a little rougher on the bumps. Hate soft tires; don't like sliding around corners. No matter the tire size, I never go up to max if about to make a long trip in hot weather. I keep them 2 pounds below max cold pressure. It helps nowadays with a tire pressure monitoring system.
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hoopitup2000
Champion Author Virginia

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Message Posted: Nov 12, 2014 7:45:15 AM

Manufacturers key concern is comfort & safety when deciding on their recommendation. Going higher can increase mileage, especially once one learns how to maximize coasting skills.
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GasMiser718
Champion Author Detroit

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Message Posted: Nov 12, 2014 1:34:48 AM

I wouldn't think so, that's why the manufacturer have recommended tire pressures.
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OilerFan
Champion Author Tulsa

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Message Posted: Nov 7, 2014 7:30:31 AM

I would stick with manufacturer's recommendations for pressure. That'll make tires last longer.
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Ratso
Champion Author Ohio

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Message Posted: Nov 7, 2014 5:58:34 AM

it helps, but decreases tire wear...whatever floats your boat !
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FrankLee1
All-Star Author Minnesota

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Message Posted: Nov 7, 2014 5:51:07 AM

I run about 45 psi in all my cars and trucks.
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twt
Champion Author Virginia Beach

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Message Posted: Nov 7, 2014 2:56:52 AM

Just what we need here. Another "EXPERT". Use the recommended TIRE PRESSURE!
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Bad_Petroleum
Champion Author Miami

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Message Posted: Nov 6, 2014 1:49:12 PM

My Honda says 32 PSI on the door frame and that IS what I use. Today for the 1st time i checked my new, but 3 months old Accord and all tires except one where 2 pounds shy, NO biggie..All taken care in my drive way with my own gages and air pump.

[Edited by: Bad_Petroleum at 11/6/2014 1:49:43 PM EST]
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Mikeyl
Champion Author Cleveland

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Message Posted: Nov 5, 2014 10:50:52 PM

Plus, remember, if a tire is at 35 psi (a fairly average psi rating), it will increase with use. So, on a warm day going along a highway, it may go up an additional 5 psi.

Over inflating can cause a catastrophic blowout which can cause a deadly accident. Why risk it?
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selvan777
Rookie Author Sacramento

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Message Posted: Nov 5, 2014 4:08:52 PM

True but it's not safe, you'll have less traction, mainly, not to mention a shorten life span due to uneven wear.

But I've always added about 10 extra pounds to my low-pros after picking up the car from having them balanced at the shop, they always set it back to manufacturer specs, I guess it's an insurance thing of theirs.

Oh, I should mention, I add those extra pounds so the low-pros wear more evenly, which they do. Remember, the manufacture suggested psi is only for the stock tires.

[Edited by: selvan777 at 11/5/2014 4:13:59 PM EST]
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one800rv
Rookie Author Florida

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Message Posted: Nov 5, 2014 3:13:30 PM

Don't know about the fuel savings but it makes the tires last longer and have fewer flat tires by inflating to the VEHICLE'S recommended psi. Not the psi on the tire!
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GasMiser718
Champion Author Detroit

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Message Posted: Nov 5, 2014 1:34:46 PM

Again, I just put in what the manufacture says to.
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hoopitup2000
Champion Author Virginia

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Message Posted: Nov 4, 2014 6:31:36 AM

Yes . . . .
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proudvet1
Rookie Author Atlanta

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Message Posted: Nov 3, 2014 11:19:15 PM

Yes
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LibertyGuardian
Veteran Author Arizona

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Message Posted: Nov 3, 2014 8:04:40 AM

Perhaps but I've found that in most instances for every advantage there's a disadvantage and excessive tire pressure is most certainly one.

I've gone with the manufacture's recommendations for the past 60 years I've been driving and it's worked just fine for us so I believe I'll just stay the course.

[Edited by: LibertyGuardian at 11/3/2014 8:05:36 AM EST]
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Jackson126
All-Star Author Virginia

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Message Posted: Nov 3, 2014 7:00:21 AM

yes
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xbAG
Champion Author California

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Message Posted: Nov 1, 2014 8:50:38 PM

I have NO clue.
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luvmyrv
Champion Author Winnipeg

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Message Posted: Nov 1, 2014 3:55:36 PM

The increase you get in mpg wont make up for the increased speed at which your tires will wear out and need to be replaced.
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RealtorJeff
All-Star Author San Diego

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Message Posted: Nov 1, 2014 2:23:56 PM

That's what I have been told
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carinthuist
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Message Posted: Nov 1, 2014 1:34:03 PM

yes
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GLM4205
Champion Author Toledo

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Message Posted: Nov 1, 2014 12:44:50 PM

Use manufacturers recommendations.
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dontuknowOH
Champion Author Ohio

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Message Posted: Nov 1, 2014 10:40:24 AM

Whenever I do a familiar interstate, mostly during summer days, I then notice the majority of vehicles driving the higher speeds. Notice they all have rounder formation tires. meaning seldom do I see the bottom small bulge(footprint area), that to me says hard higher tire travel pressure.

Trucks, Suvs, Vans, some large cars firm/rounder, pressure I don't know about, but they the owners/drivers seem to realize that helps mileage. The local comparison I see can be nasty bulges, mini vans the worst, some older trucks and cars with one or more low tires driving city. 29....32% guess.(unaware)ness.......! Duh....!

Just saying about 85% the frequent interstate drivers must know good/higher tire inflation counts for better mileage, I just see many not few there traveling, passing with firmer tires rolling, 24-7 fashion, anytime! Stay Safe!
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MertieMan
Champion Author Lexington

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Message Posted: Nov 1, 2014 8:48:19 AM

Safety is of concern here, only run what is recommended in the tire, and don't risk your life for control of any vehicle by violating safety precautions.
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PaylessKY
Champion Author Kentucky

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Message Posted: Oct 26, 2014 1:48:27 PM

Go by what the tire placard on you vehicle says.
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puddy
Champion Author Wisconsin

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Message Posted: Oct 25, 2014 7:47:41 AM

Yes
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twt
Champion Author Virginia Beach

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Message Posted: Oct 25, 2014 5:10:43 AM

Just what we need. Another "EXPERT" that doesn't have a clue.
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Mikeyy1960
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Message Posted: Oct 24, 2014 7:50:28 PM

to answer the question, yes they do
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dontuknowOH
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Message Posted: Mar 7, 2014 11:36:41 AM

I agree with HotRod10 You need right air pressure in the tires for good mileage not just air. putting in just air is low inflated. use the pressure gauge device. Balloons accept lots of air because they stretch/stretch/stretch, tires are much different, the correct pressure instead of volume is the clue for load support/safety/wear DIYing my modern tires for better fuel mileage. LOL
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HotRod10
Champion Author Wyoming

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Message Posted: Mar 7, 2014 10:44:48 AM

"Follow manufacturer specs on the tire wall"

The specs on the tire are maximums for safe usage of the tire, not recommendations for what to use for any particular vehicle. The same tire usually fits many different vehicles with varying load conditions. I have similar sized tires on a van and a pickup; the recommended pressure on the door panel of the van is 38 psi, but it's 26 psi for the pickup. The max on the sidewall is 44psi for both. I run about 30psi for the pickup (unless I'm loading it near it's max payload, when I'll push it up to about 38) and about 40psi for the van. The van has a much heavier curb weight and requires higher pressure for the tires to be the right shape under the load they normally carry.
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jimmy544
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Message Posted: Mar 7, 2014 10:04:19 AM

The ride can be very harsh at excessive tire pressure and tire wear gets concentrated in the middle of the tread.
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Vin63
Champion Author San Bernardino

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Message Posted: Mar 7, 2014 9:46:39 AM

Yes, at the expense of faster/uneven tire wear.
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jay93LA
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Message Posted: Mar 7, 2014 9:42:06 AM

yes
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WES03
Champion Author Maryland

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Message Posted: Mar 7, 2014 9:06:22 AM

Generally speaking, yes.
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chrisisawesome1
Sophomore Author Texas

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Message Posted: Mar 6, 2014 11:08:52 PM

The correct psi depends on the tire. Higher or lower decreases economy and increases tire wear. Follow manufacturer specs on the tire wall
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goldmonk
Champion Author Toronto

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Message Posted: Mar 4, 2014 8:28:50 PM

mine keeps at 30 psi
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skaboss79
Sophomore Author New Mexico

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Message Posted: Mar 4, 2014 11:39:04 AM

how long does it usually take for tires to deflate?
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Houckster
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Message Posted: Mar 4, 2014 10:38:59 AM

FLORIDAMAN writes: I always keep my tires near the max air pressure on the sidewall which makes the mpg's better, tires last longer, car handles better. Just rides a little rougher. It's a better trade off.
_____
That's my experience. If I run over a dime, I can tell you if it was heads or tails.
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Floridaman2013
Champion Author Florida

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Message Posted: Mar 4, 2014 10:06:00 AM

I always keep my tires near the max air pressure on the sidewall which makes the mpg's better, tires last longer, car handles better. Just rides a little rougher. It's a better trade off.
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HotRod10
Champion Author Wyoming

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Message Posted: Mar 4, 2014 9:55:23 AM

"Also, don't forget about warranty issues."

I've read the warranty exclusions for my tires. For the warranty to be valid, the pressure needs to be maintained at or above the vehicle's recommended pressure (on the door tag) and below the maximum design pressure on the sidewall.
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twt
Champion Author Virginia Beach

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Message Posted: Mar 4, 2014 7:51:54 AM

Keep your tires inflated at the recommended factory specs.
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hoopitup2000
Champion Author Virginia

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Message Posted: Mar 4, 2014 7:04:53 AM

Yes, it will improve fuel economy, especially if one knows how to coast effectively.

Many people I know have to ALWAYS be pressing on either the gas or brake & NEVER allow the car to coast. These people will benefit little from higher tire pressures.
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BobFang
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Message Posted: Mar 4, 2014 6:13:19 AM

It helps but the higher pressures should be used in moderation.
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Houckster
Champion Author Atlanta

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Message Posted: Mar 4, 2014 1:09:09 AM

DIESELPOWER2014 writes: It is true if they are inflated really tight. As the tire expands it becomes round instead of flat. That's why your tires wear out on the inside and outside of the tread surface when under inflated.
__________
By "inflated really tight" I am guessing that you mean inflated beyond the Max PSI on the tire sidewall. No one here is recommending that. Short of the Max PSI though, there will be no increased tire wear. You're 40 years behind the times. We are not using bias-ply tires anymore. Modern radial tires have belts to prevent tire squirm and expansion that will cause excessive wear in the vented of the tread. I've always run higher pressures than recommended by the OEM. I've got 50K+ on these tires and they'll be good for another 30K more.

As for wear on the edges of the tire of tire when underinflated. Any tire will wear excessively on the edges if it doesn't have enough air to maintain its proper shape under load.

[Edited by: Houckster at 3/4/2014 1:15:01 AM EST]
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stonejd
Champion Author Illinois

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Message Posted: Mar 4, 2014 1:06:37 AM

a little bit
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