Not Logged In Log In   Sign Up   Points Leaders
Follow Us    10:01 PM

Message Forum - Read Message

Category: Fuel Economy > Topics Add to favorite topics   Post new topicPost New Topic
Author Topic: Do higher tire pressures help mpg? Back to Topics
iaqxf
Rookie Author
Ohio

Posts:7
Points:265
Joined:Dec 2004
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]
REPLIES (newest first) Post a Reply
dontuknowOH
Champion Author Ohio

Posts:3,960
Points:68,085
Joined:Aug 2009
Message Posted: Feb 28, 2015 12:36:30 AM

Yes, any lower pressure than what is proper tire pressure in all 4... tires, really wastes fuel mileage at any speed, even starting motion each time, also wastes when resuming back up to travel speed.

Any low inflated tire constantly hampers motion, by resisting rolling motion, almost similar to having a brake force turned on then creating a drag load. A visual check often is a cheap fix to save against worse fuel consumption. Air of course won't jump into the low tire just by looking at it.

Also if driving highway speeds over longer distances a low tire if mounted to the vehicles drive axle, that can cause extra stress/heat build up in the differential drive gears FWD or RWD, depends on where the low tire is in use. A 15---20# lower pressure tire, under inflated for example (very noticeable. Just do a visual check often, that saves $$$ later on!
ray44512
Veteran Author Ohio

Posts:255
Points:179,415
Joined:May 2007
Message Posted: Feb 27, 2015 8:50:49 PM

Yes.
poetdog73
Champion Author Toledo

Posts:2,197
Points:1,261,600
Joined:Aug 2008
Message Posted: Feb 26, 2015 10:15:02 AM

don't know
badbobKY
Champion Author Lexington

Posts:1,282
Points:37,445
Joined:Aug 2013
Message Posted: Feb 26, 2015 10:05:19 AM

no
gvan
Champion Author Chicago

Posts:26,169
Points:3,610,715
Joined:Dec 2004
Message Posted: Feb 26, 2015 9:21:53 AM

"Add a moderate increase of PSI for better edfficiency. Be sure to check the sidewall for info."

Be sure to check the owners manual or the placard on the driver door jamb for proper PSI....not the tire. A few pounds over the recommended pressure should not be a problem for handling or braking.
borego
Rookie Author Sarasota

Posts:3
Points:324,210
Joined:Mar 2013
Message Posted: Feb 26, 2015 7:40:39 AM

depends on your tires and speed
dontuknowOH
Champion Author Ohio

Posts:3,960
Points:68,085
Joined:Aug 2009
Message Posted: Feb 26, 2015 5:46:50 AM

I just try to stay within 2-3# of the max rating on the tire, running good tires. No problems yet on any of Our vehicles, past/present! Better MPG's!
nru
Champion Author Twin Cities

Posts:6,854
Points:1,757,250
Joined:Feb 2006
Message Posted: Feb 25, 2015 10:49:33 PM

Better mileage - longer stopping distance and less steering control
gas2guzz
Sophomore Author New Jersey

Posts:149
Points:77,930
Joined:Jan 2008
Message Posted: Feb 25, 2015 7:47:58 PM

slightly
PaylessKY
Champion Author Kentucky

Posts:11,985
Points:2,355,745
Joined:Oct 2008
Message Posted: Feb 25, 2015 2:54:04 PM

Use the size tires your vehicle came with, and check the tire placard for proper psi.
cheapmonkee
Champion Author Portland

Posts:34,254
Points:3,947,435
Joined:Jun 2004
Message Posted: Feb 25, 2015 2:13:05 PM

Add a moderate increase of PSI for better edfficiency. Be sure to check the sidewall for info.
jameskel
Rookie Author Washington

Posts:23
Points:441,700
Joined:Nov 2013
Message Posted: Feb 18, 2015 5:03:14 PM

I always go with what the TIRE manufacturer says on the tire, not what the car maker wrote in its manual 20 years (and 8 sets of tires) ago.

James
Houckster
Champion Author Atlanta

Posts:11,132
Points:769,940
Joined:Sep 2003
Message Posted: Feb 13, 2015 3:45:16 PM

One poster writes: this true, I should over-inflate?... makes sense, physically, but suspect risks outweigh this reward
______
Inflating a tire a bit over the OEM recommendation will not increase risk in any significant way. Tires that are a bit overinflated relative to the OEM recommendation allow the car to handle better. Some are concerned about a reduced treadprint leading to reduced braking, especially in a hard stop situation. This is untrue because the rapid stop will throw more weight on the front tires increasing their footprint.

I run my tires at 8 PSI above the OEM recommendation in the back and 12 PSI over on the front tires. I've never had a problem. And the tire wear? I have almost 54K on the tires and they look good for another 25-30K more.

The front tires should have a higher PSI than the rear tires because they must bear more weight and as a result, they don't distort as much, especially in turns.

Of course, NEVER inflate the tire above the maximum inflation level shown on the tire's sidewall.
dontuknowOH
Champion Author Ohio

Posts:3,960
Points:68,085
Joined:Aug 2009
Message Posted: Feb 11, 2015 10:26:12 PM

Recently I have spotted many cars with at least one low inflated tire. Each time the Wife and I drive locally to shop or eat out, we see at least three vehicles running a low tire(excessive footprint). That is a big fuel waster, usually the rear tire, tires.
drydem
Veteran Author Maryland

Posts:293
Points:8,320
Joined:Oct 2011
Message Posted: Feb 11, 2015 7:18:22 PM

Higher tire pressures helpa a car coast farther on momentum so if the driver pulses the accelerator and then allows the car to coast on momentum for a long time and if the driver coast to a stop rather than accelerates towards a stopping point .... the car's MPG up...

Mininana
All-Star Author New York

Posts:750
Points:77,290
Joined:Dec 2014
Message Posted: Feb 11, 2015 6:39:22 PM

this true, I should over-inflate?... makes sense, physically, but suspect risks outweigh this reward

[Edited by: Mininana at 2/11/2015 6:39:42 PM EST]
speedy_911
Champion Author Phoenix

Posts:6,510
Points:1,177,865
Joined:Jun 2006
Message Posted: Feb 11, 2015 4:06:37 PM

Yes...
Mikeyy1960
All-Star Author Cape Coral

Posts:783
Points:259,745
Joined:Aug 2014
Message Posted: Feb 11, 2015 2:57:46 PM

to just answer the question: yes they do.
eyegotgas2
Champion Author British Columbia

Posts:4,828
Points:1,022,905
Joined:Sep 2011
Message Posted: Feb 11, 2015 3:14:13 AM

I believe so
ray44512
Veteran Author Ohio

Posts:255
Points:179,415
Joined:May 2007
Message Posted: Feb 11, 2015 1:06:37 AM

Yes, rolling resistance is reduced.
hoopitup2000
Champion Author Virginia

Posts:1,982
Points:614,985
Joined:Jul 2013
Message Posted: Jan 18, 2015 11:09:22 PM

Yes
GLM4205
Champion Author Toledo

Posts:6,793
Points:1,453,485
Joined:Dec 2010
Message Posted: Jan 18, 2015 9:50:57 PM

I fill my tires, at the manufacturer's recommended pressure.
HideMKE
Champion Author Milwaukee

Posts:3,155
Points:763,350
Joined:Mar 2012
Message Posted: Jan 17, 2015 11:15:30 AM

yes
Floridaman2013
Champion Author Florida

Posts:3,009
Points:648,910
Joined:May 2013
Message Posted: Jan 17, 2015 6:16:31 AM

I always keep my tires at the sidewall max less 3-5 PSI for heat build up. Tires last long, car/truck handles great, and fuel mileage is at the max. Don't care if the ride is a little stiffer as we didn't buy these vehicles for a mushy ride.
twt
Champion Author Virginia Beach

Posts:13,866
Points:1,754,735
Joined:Mar 2005
Message Posted: Jan 17, 2015 5:41:39 AM

I fill my tires, at the manufacturer's recommended pressure.
carinthuist
Champion Author San Francisco

Posts:6,086
Points:1,031,475
Joined:Mar 2012
Message Posted: Jan 16, 2015 10:38:16 PM

yes
k7lvo
Veteran Author Medford

Posts:379
Points:255,550
Joined:Jun 2012
Message Posted: Jan 16, 2015 10:34:45 AM

Up to a point. Over-inflation will improve gas mileage some, but tire mileage will suffer. Traction will suffer, too, leading to large expense.
pilotdlh
Champion Author Minnesota

Posts:1,135
Points:985,140
Joined:Nov 2011
Message Posted: Jan 15, 2015 11:59:58 AM

Yes.
That's why tire pressure monitors are mandated on cars now.
46chief
Champion Author Indiana

Posts:6,603
Points:2,562,065
Joined:May 2006
Message Posted: Jan 14, 2015 3:54:17 PM

A little, maybe.
dontuknowOH
Champion Author Ohio

Posts:3,960
Points:68,085
Joined:Aug 2009
Message Posted: Jan 13, 2015 10:46:32 AM

Anyone that has ever roller skated or owned their own skates would probably know that wheels, when they are more round and also firm in construction, those wheels roll better.

The other part is the type of bearings, wheel material used, and then the floor(skating surface)V/S energy used/total weight involved. The worst problem is the small size of those skate wheel diameters in relation to bulk above or rather what total weight is on top of them rolling in motion.

There will always be some drivers out rolling around with no thoughts about vehicle tire pressure as a mind set. Bicycle riders soon stay clued in on the importance of correct tire pressure. Drivers that are counting their Fuel Pennies learn or don't care to. I routinely check my vehicles and leave those skates alone at my age, enjoy the memories/pennies saved.
badbobKY
Champion Author Lexington

Posts:1,282
Points:37,445
Joined:Aug 2013
Message Posted: Jan 13, 2015 10:21:28 AM

no
carinthuist
Champion Author San Francisco

Posts:6,086
Points:1,031,475
Joined:Mar 2012
Message Posted: Jan 13, 2015 9:47:55 AM

yes
WEDDY
Champion Author Phoenix

Posts:6,639
Points:1,809,020
Joined:Oct 2009
Message Posted: Jan 13, 2015 9:01:50 AM

Yes
xtremecheap
Champion Author Arkansas

Posts:1,308
Points:392,200
Joined:Jun 2011
Message Posted: Jan 11, 2015 7:05:35 PM

Yes try pushing your auto and then let some air out of the tires and try again.
Over inflation and under inflation both causes premature tire wear. Over wears the center, and under wears the sides. I like to era on the side of over inflation(1-5 psi) to what the vehicle's recommended psi.
If a lot of extra weight is being carried, I would go even a little higher.
GBMAX
Champion Author Phoenix

Posts:7,837
Points:2,659,025
Joined:Feb 2005
Message Posted: Jan 11, 2015 5:23:04 PM

close
hoopitup2000
Champion Author Virginia

Posts:1,982
Points:614,985
Joined:Jul 2013
Message Posted: Jan 11, 2015 3:59:12 PM

Yes. . . .
97PearlCat
Champion Author Tulsa

Posts:7,310
Points:1,608,020
Joined:Dec 2010
Message Posted: Jan 11, 2015 3:39:29 PM

Yes it helps.
lilmx5guy
Veteran Author Scranton

Posts:301
Points:440,330
Joined:Nov 2011
Message Posted: Jan 11, 2015 3:24:47 PM

Yes, but could decrease the tires life due to center wearing out prematurely, negating the gain in MPG.
Nuzan
Champion Author Nevada

Posts:1,100
Points:737,530
Joined:Jun 2012
Message Posted: Nov 23, 2014 3:19:40 PM

Yes
JohnCur
All-Star Author New Jersey

Posts:599
Points:563,435
Joined:Feb 2013
Message Posted: Nov 19, 2014 2:31:24 PM

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

Posts:3,155
Points:763,350
Joined:Mar 2012
Message Posted: Nov 19, 2014 12:40:10 PM

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

Posts:1,001
Points:40,420
Joined:Feb 2013
Message Posted: Nov 19, 2014 11:40:55 AM

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

Posts:5,520
Points:1,703,360
Joined:Oct 2005
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.
GasMiser718
Champion Author Detroit

Posts:5,210
Points:298,230
Joined:Apr 2006
Message Posted: Nov 16, 2014 7:53:25 AM

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

Posts:3,009
Points:648,910
Joined:May 2013
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.
hoopitup2000
Champion Author Virginia

Posts:1,982
Points:614,985
Joined:Jul 2013
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.
GasMiser718
Champion Author Detroit

Posts:5,210
Points:298,230
Joined:Apr 2006
Message Posted: Nov 12, 2014 1:34:48 AM

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

Posts:16,863
Points:3,073,260
Joined:Aug 2005
Message Posted: Nov 7, 2014 7:30:31 AM

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

Posts:23,934
Points:3,455,745
Joined:Sep 2003
Message Posted: Nov 7, 2014 5:58:34 AM

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

Posts:1,001
Points:40,420
Joined:Feb 2013
Message Posted: Nov 7, 2014 5:51:07 AM

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

Posts:13,866
Points:1,754,735
Joined:Mar 2005
Message Posted: Nov 7, 2014 2:56:52 AM

Just what we need here. Another "EXPERT". Use the recommended TIRE PRESSURE!
Post a reply Back to Topics