Not Logged In Log In   Sign Up   Points Leaders
Follow Us    12:37 AM

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
Profile Pic
jonjax14
Champion Author Jacksonville

Posts:1,006
Points:174,770
Joined:Dec 2014
Message Posted: Apr 18, 2015 12:18:07 AM

ok
Profile Pic
ricebike
Champion Author New Jersey

Posts:13,001
Points:2,614,935
Joined:Oct 2005
Message Posted: Apr 17, 2015 9:21:29 AM

wait are those figures backwards???
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:2,203
Points:674,910
Joined:Jul 2013
Message Posted: Apr 17, 2015 6:41:59 AM

Yes they do!!
Profile Pic
Madridjoe
All-Star Author Lancaster

Posts:547
Points:250,460
Joined:Jun 2007
Message Posted: Apr 17, 2015 6:12:40 AM

works for me
Profile Pic
dontuknowOH
Champion Author Ohio

Posts:4,104
Points:73,125
Joined:Aug 2009
Message Posted: Apr 16, 2015 7:22:50 PM

I just don't thing that FWD vehicles have as much side scuff front tire wear when turning in relation to the vehicle's pointed main chassis/body direction, as much as RWD vehicles. Mainly when the foot-print is reduced in size by more safe tire pressure.

Each tire has a center pivot point when direction changes are made, the larger footprint takes on more sideward scuffing (sq.in. of contact area for/aft of the pivot center), during direction changes, then being under power rotation energy also to some degree.

Rounder is firmer, with less deflection at the footprint, less heat, less side scuff of the tread. Side scuff similar to a skid loader with tracks turning/sliding the tread/pavement surface, when turning direction, an exaggeration on My part. AIse Rear wheel drive vehicles are much different in character with the chassis force concerning the front non-powered wheels that steer only. Pizza Time!........Arrived!
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Apr 16, 2015 9:53:36 AM

"Yes, at the expense of faster/uneven tire wear."

I have yet to hear from anyone who runs their tires a few psi over the door panel recommendations that they experienced faster or uneven wear. Everyone I've heard from, both in the forum here and in person, claims longer and more even treadwear by running 3-5 psi over. That has been my experience as well.
Profile Pic
Vin63
Champion Author San Bernardino

Posts:3,040
Points:742,285
Joined:Oct 2007
Message Posted: Apr 16, 2015 9:35:46 AM

Yes, at the expense of faster/uneven tire wear.
Profile Pic
f64
Rookie Author San Diego

Posts:75
Points:298,925
Joined:Oct 2013
Message Posted: Apr 9, 2015 3:20:53 AM

Definitely yes. Tire wear is affected also.
Profile Pic
Raider44
Champion Author Allentown

Posts:3,802
Points:2,420,385
Joined:Apr 2008
Message Posted: Apr 9, 2015 12:31:37 AM

I would think so. less surface contact and resistance at higher pressures.
Profile Pic
LanguageMan1
Champion Author Tampa

Posts:17,560
Points:2,517,715
Joined:Apr 2008
Message Posted: Apr 8, 2015 5:12:45 PM

Yes, it does help. I don't need Mythbusters to tell me if something works or not, and they're not always right. I can get more mileage than most people out there.
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Apr 6, 2015 9:47:00 AM

"The makers set an ideal pressure that will allow the designed tire's tread to work properly resulting in a safer (and softer) ride at a lesser mpg."

The tire makers don't set an "ideal pressure", they set a maximum pressure, found on the sidewall of the tire. The car makers set a minimum pressure for the vehicle, typically found on the door panel, that keeps the tires from overheating and provides the most comfortable ride. The best performance and treadwear are generally at 2-5 psi over the door panel pressures, and as you can see from the OP, significantly better mileage as well.
Profile Pic
hyeglenn
Champion Author Fresno

Posts:4,298
Points:1,469,485
Joined:Apr 2011
Message Posted: Apr 6, 2015 9:32:17 AM

Yes.
Profile Pic
twotanksaweek
Veteran Author Dayton

Posts:384
Points:90,450
Joined:Jan 2011
Message Posted: Apr 5, 2015 9:46:43 PM

There is a trade off between economy and safety. The higher pressure equals a smaller footprint therefore less resistance and higher mpg. The makers set an ideal pressure that will allow the designed tire's tread to work properly resulting in a safer (and softer) ride at a lesser mpg.

[Edited by: twotanksaweek at 4/5/2015 9:47:46 PM EST]
Profile Pic
SAButton
All-Star Author Atlanta

Posts:507
Points:911,870
Joined:May 2011
Message Posted: Apr 4, 2015 9:55:54 AM

No
Profile Pic
dontuknowOH
Champion Author Ohio

Posts:4,104
Points:73,125
Joined:Aug 2009
Message Posted: Apr 4, 2015 8:45:56 AM

I have tailored my tire pressures to staying near to within 2-3 lbs. of the rated max limit on each tire spec. Also if traveling highway during very hot days(low - upper 90* F temp. days, I then do hot tire pressure checks often.

Before the fuel prices rose higher above $1.00 per gal. back in the late "90's" I kept our vehicle tire pressures near 2 lbs. above the vehicles door specs.

For over 15 years of driving since then "1999", there has been no problems, wear related. The compacts I drive handle well at all types of driving, corner well, no under/over steer, no hydroplaning, reasonable winter traction, a slightly harsh ride when not loaded (light-moderate)or less is experienced along with much fuel savings.

Being retired I do very little hard cornering, knowing that causes much front tire wear leaving a high center with scrubbed sides on the front tread wear, inner/outer areas on the front tires.

Hard acceleration while turning in a steering type arc (left/right) with FWD vehicles often wears the center mid portion of the front tires, wears the tread back to even with the outer portion. Hard acceleration in turn fashion does put extra strain on C/V drive axle joints.

Most drivers encounter daily these traffic patterns of heavy use. Saying I don't have problems with our FWD tire uneven wear(seldom hammer the pedal)in the turns. Rear tires wear well if not driving county, where the roads have higher crowned centers, and curves not always banked proper, many that way causes rear tire wear as a handling problem for Zoomers. Stay Safe!
Profile Pic
lyons_coop
All-Star Author Kansas

Posts:774
Points:398,190
Joined:Jan 2012
Message Posted: Apr 3, 2015 1:31:27 PM

It does to a point, however you want to stick with vehicle recommendations, not what is stamped on the tire. Over inflation can compromises the footprint of the thread in contact with the road and cause uneven wear on the tire.
Profile Pic
jdmd6613
Champion Author Memphis

Posts:3,035
Points:856,805
Joined:May 2013
Message Posted: Apr 3, 2015 9:25:41 AM

NO
Profile Pic
cv
Champion Author Raleigh

Posts:18,706
Points:4,153,605
Joined:Oct 2003
Message Posted: Apr 2, 2015 5:48:06 AM

It looks like it does, be careful not to over inflate.
Profile Pic
JimBlake56
Veteran Author Akron

Posts:422
Points:115,380
Joined:Oct 2010
Message Posted: Apr 1, 2015 9:52:12 AM

Actually, I agree with you HotRod about the empty truck. It's about supporting the weight (heavy or light weight) with the "proper" amount of tire deformation.
Trucks will have a much larger difference in gross weight empty vs. full.
Profile Pic
eyegotgas2
Champion Author British Columbia

Posts:5,135
Points:1,089,210
Joined:Sep 2011
Message Posted: Apr 1, 2015 8:12:50 AM

I thought higher air pressure was better on gas. I try to use about 32 psi myself
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 26, 2015 10:45:28 AM

mybigtruck, if that 80 psi is within 5 or 10 psi of the recommended door panel pressures and below the maximum sidewall value, you shouldn't have any problems, especially on the front. On the rear, I suspect you will probably see slightly more wear in the center of the tread eventually, unless you keep it loaded with a camper or something most of the time.

I can see your reaction now, JimBlake56 - "but you just said...". A truck is a special case. The empty weight distribution skews heavily to the front, but fully loaded it is much heavier to the rear axle. Running empty, I keep the rear tires on my pickup right at the door panel and the fronts about 3 psi over. If I'm going to be hauling a heavy load, I bump the rears up close to the max sidewall pressure.
Profile Pic
mybigtruck
Champion Author San Jose

Posts:1,460
Points:951,050
Joined:Oct 2009
Message Posted: Mar 26, 2015 12:47:43 AM

i run 80psi on all 4 in my f350 truck
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 25, 2015 10:55:54 AM

"Leave the psi at what the tire recommends"

There is no recommended pressure on tires, there is only maximum pressure. The recommended pressure (for the OE tire size) is on the vehicle, typically on the driver's door panel. This value is the lowest allowable pressure, providing the greatest comfort for the passengers without sacrificing the integrity of the tires due to overheating.

Without sacrificing safety on either end, the best mileage will be achieved at the maximum sidewall pressure, the most comfortable ride is achieved at the door panel recommended pressure, and generally the best handling, cornering, and treadlife will occur between those two extremes.
Profile Pic
Maintroll
Champion Author Lexington

Posts:12,106
Points:2,553,010
Joined:Aug 2008
Message Posted: Mar 25, 2015 5:14:11 AM

Leave the psi at what the tire recommends, safety is involved here.
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 23, 2015 9:29:13 AM

"About 7 inches wide & 5 inches long."

And how much did it change by overinflating the tires by 3 psi?
Profile Pic
JimBlake56
Veteran Author Akron

Posts:422
Points:115,380
Joined:Oct 2010
Message Posted: Mar 23, 2015 8:03:40 AM

About 7 inches wide & 5 inches long. Not real straight edges, but the contact was more like an ellipse & less like a rounded rectangle.
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 17, 2015 6:52:47 PM

"That contact patch seems reasonable if you think about trying to slide 4 pieces of paper under your tire from 4 different directions. Roughly outlining a rectangle contact patch with rounded corners. I'll try to remember to do that to my tires."

Yeah, let us know how that turns out. I doubt very much the patch length is anything close to 4 inches.

"The circumferential belts control the circumference of the tire."

...and all sections of the tire - center and shoulders, controlling the circumference of the center of the tread to the same as the that of the shoulders, keeping the entire width of the tread in contact with the road.

Profile Pic
poetdog73
Champion Author Toledo

Posts:2,317
Points:1,324,125
Joined:Aug 2008
Message Posted: Mar 17, 2015 12:07:14 AM

whatever my tire recomends
Profile Pic
JimBlake56
Veteran Author Akron

Posts:422
Points:115,380
Joined:Oct 2010
Message Posted: Mar 16, 2015 4:37:38 PM

The circumferential belts control the circumference of the tire. They don't force it into a circle, but they flex at the road resulting in a slightly-larger circle with a flat spot at the bottom. The radial cords balloon outwards following the rounded shape of the sidewall. But that force distribution is resolved inside the tire structure and there's no external forces except the axle & the contact patch.

Using approximate but typical numbers... (my car)

3,400 pound car
60% forwards weight bias
215mm tire section width
38 psig inflation pressure

gives:
1020 pounds supported by each front tire (no dynamic loads included)
26.8 square inches of contact patch
6.8-inch-wide contact patch (90% of the section width)
4 to 4.5 inch long contact patch (depending how the corners are rounded)

That contact patch seems reasonable if you think about trying to slide 4 pieces of paper under your tire from 4 different directions. Roughly outlining a rectangle contact patch with rounded corners. I'll try to remember to do that to my tires.
Profile Pic
cv
Champion Author Raleigh

Posts:18,706
Points:4,153,605
Joined:Oct 2003
Message Posted: Mar 14, 2015 7:50:22 AM

I simply use the vehicle recommendations for both of mine.
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 13, 2015 2:39:31 PM

"That total upwards force against the tread of the tire, has to support the weight, because there's nothing else to support the weight."

Correct. However, the internal restraint will dictate **how** the force is transferred through the tread and the distribution of the force.

"I still think the total contact area has to follow F = P*A..."

Try putting some numbers to that formula and you'll find the contact area would have to be very large.

"with only a small contribution from the bending stiffness of the cords making up the tire."

It's not the bending stiffness of the cords, it's the tension stress of the **radial** cords (the ones that follow the circumference of the tire) limiting the diameter of the tire along the center of the tread to the same diameter as the shoulders, thus keeping the tread flat across the width of the tire.
Profile Pic
JimBlake56
Veteran Author Akron

Posts:422
Points:115,380
Joined:Oct 2010
Message Posted: Mar 13, 2015 1:45:46 PM

I wouldn't expect the width of the contact patch to get much smaller with increased pressure. I'd expect the length of the patch to be reduced. So a contact patch that's a bit like an oval, will shrink it's minor axis but not it's major axis.

And the forces can be applied as a free-body diagram. Downwards force of say 25% or 30% of the car's weight applied at the axle. Upwards (reaction) force of the ground against the tire. That total upwards force against the tread of the tire, has to support the weight, because there's nothing else to support the weight.

I still think the total contact area has to follow F = P*A with only a small contribution from the bending stiffness of the cords making up the tire.
Profile Pic
drydem
Veteran Author Maryland

Posts:355
Points:11,180
Joined:Oct 2011
Message Posted: Mar 13, 2015 8:05:55 AM

Tire deformation usually starts to occurs after the tire pressure exceed the maximum tire pressure stated on the tire side wall. Deformation occurs slightly so being off by a few psi isn't going to cause drastic lost of traction surface. As the tire pressure goes 10 psi or 15 psi over the maximum tire pressure as stated on the sidewall - there is a measurable lost in tire-to-road tread contact surface area so while rolling resistance is reduced measurably so is the tire's grip on the road and hence there is a greater safety concern/challenge. I've experimented with going over 10 psi over the maximum sidewall pressure rating on my Yokohama Avid s33D with my 2010 Prius - while there is a slight advantage for coasting in some driving scenarios - there are other driving techniques that have a better and higher real world benefit to cost/risk than going over the maximum sidewall tire pressure. In a close circuit track during a fuel-efficiency marathon setting the tire pressure 10 to 20 psi over the maximum sidewall tire pressure can provide a hypermiler an edge to achieve 100 mpg using certain types of vehicles at speeds less than 25 mph -- but for the real world - I would nix going over the max side wall tire pressure and focus my efforts on other ways to get the extra MPGs. In the real world, the driver has to drive much fasters, road surfaces are much rougher, and the vehicle must stop more frequently ... so rolling resistance is a smaller portion of the MPG equation... which makes the value of higher tire pressure less valuable...


[Edited by: drydem at 3/13/2015 8:11:46 AM EST]
Profile Pic
Floridaman2013
Champion Author Florida

Posts:3,247
Points:719,495
Joined:May 2013
Message Posted: Mar 13, 2015 7:38:52 AM

Always keep mine at 2 lbs below TIRE sidewall max. Best handling/fuel mileage/ tire wear.
Profile Pic
Ratso
Champion Author Ohio

Posts:24,333
Points:3,522,070
Joined:Sep 2003
Message Posted: Mar 13, 2015 7:08:59 AM

heh ...ok !
Profile Pic
BlackArrowNY
Rookie Author New York

Posts:31
Points:4,320
Joined:Aug 2011
Message Posted: Mar 12, 2015 9:58:00 PM

I have found that I consistently achieve better fuel economy by maintaining a tire pressure 2-3 psi higher than the sticker indication. I have not experienced more wear and handling is predictable.
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 12, 2015 9:13:15 PM

"Draw me a free-body diagram of the forces..."

You almost sucked me into that one, but a tire is not a free body. It has internal stresses and restraints. Of primary importance in the case of a radial tire is the radial belts, which restrain the middle of the tread to the same diameter as the edge of the tread. Want proof? Look across the top of the tire. Is it bulging in the middle or almost flat? A car tire is not a balloon; under pressure it's not shaped like one, and under load it doesn't behave like one.

As I suggested earlier, if you want real proof, put a piece of white paper down on a hard, flat surface and then drive over it with an overinflated tire. You'll find the same thing I did - the full width of the tread pattern is visible on the paper.

Profile Pic
mrsteve68
Sophomore Author Toronto

Posts:121
Points:759,100
Joined:Jan 2013
Message Posted: Mar 12, 2015 3:24:29 PM

keeping the proper air pressure not only helps milage but also prevents premature wear on your tires and keeps you safer on the road
Profile Pic
JimBlake56
Veteran Author Akron

Posts:422
Points:115,380
Joined:Oct 2010
Message Posted: Mar 12, 2015 2:20:26 PM

With a tire not mounted on a rim, you can feel how limber the sidewalls are. Not enough force to support the car. Not even enough force to support the weight of a wheel, when it's not even bolted onto a car.

Draw me a free-body diagram of the forces showing how anything other than the air pressure is supporting the weight of the car?
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 12, 2015 12:54:44 PM

"Any increase in pressure will decrease the contact area."

I have to disagree. The pressure balance between the center and edges of the tread will change slightly, but with anything but the cheapest pieces of crap out there (I don't know if anything that flimsy is still allowed on the road - I haven't seen any in years), the tire has enough internal stiffness to keep the entire tread in contact with the road at a few psi over the door panel value. At 8-10 psi over, I would agree that losing contact area and the problems associated with that are very possible, and I would not recommend going that high.

"tire pressures several psi higher than the door-jamb numbers only make a moderate change in handling."

Agreed. My experience has been that 2-3 psi over results in slightly better cornering performance, but otherwise the handling was unaffected.

"I've seen longer life with more uniform treadwear by using pressures a couple psi higher than the door-jamb placard."

That's been my experience as well.
Profile Pic
runner1256
Veteran Author New Hampshire

Posts:262
Points:76,940
Joined:Oct 2012
Message Posted: Mar 12, 2015 11:29:42 AM

I read the replies and learned quite a bit, thanks.. even though it wasn't my question :) I have been getting low gas mileage and am going to put more air in tires, try that.
Profile Pic
GrumpyCat
Champion Author Alabama

Posts:6,143
Points:1,456,480
Joined:Jun 2009
Message Posted: Mar 12, 2015 10:49:05 AM

Have to try it for yourself. If you can't measure it then it doesn't exist.

Measured the tread on 255/50-19 original equipment size tires on the SUV I purchased used and was surprised and disappointed to find the center of three tires were worn more than the edges. The 4th had less wear, and even, suggesting it was replaced early in the tire's lives.

Surprising as this is a 5,000 pound vehicle and 32 PSI is the nominal recommended tire pressure.

My 4700 pounder wears 245/45-19's at 42 PSI.
Profile Pic
JimBlake56
Veteran Author Akron

Posts:422
Points:115,380
Joined:Oct 2010
Message Posted: Mar 12, 2015 10:39:00 AM

Any increase in pressure will decrease the contact area. The tire still has to support the same weight, so higher pressure means less area. The contact area also changes shape which does things to the dynamic behavior.

Simple friction where the coefficient mu is constant is just a convenient simplification. It works pretty good in common experience like sliding a solid object across a table.

A rolling tire doesn't exactly work like that. Deformation of the tire & tread as the tire rolls allows the tire to "slip" sideways even without physical slipping of the individual tread blocks against the road. This gives you understeer or oversteer tendencies long before the tires actually begin sliding. That depends on under- or over- inflation.

Having said that, tire pressures several psi higher than the door-jamb numbers only make a moderate change in handling. Not the end of the world like some of these posts.

For the cost of tire replacement, I've seen longer life with more uniform treadwear by using pressures a couple psi higher than the door-jamb placard. But that also depends on driving habits.
Profile Pic
Vin63
Champion Author San Bernardino

Posts:3,040
Points:742,285
Joined:Oct 2007
Message Posted: Mar 12, 2015 9:46:45 AM

You have to weigh the cost savings with the cost of tire replacement.
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 10, 2015 10:48:25 PM

"I'm no scientist"

Obviously not. Even if tires were overinflated to the point of reducing the contact area, which would require pressure well beyond the maximum, it would not reduce the grip until the internal shear capacity of the rubber is exceeded (the tires are leaving rubber on the road). Traction is the product of force (weight) and the coefficient of friction, contact area is irrelevant under normal driving conditions on paved roads.

Modern tires hold their shape even at several psi over the door panel recommended pressure. If you want proof, lay a piece of white paper on a flat surface and drive over it with a seriously overinflated tire and see that the full tread pattern is visible.
Profile Pic
Mininana
Champion Author New York

Posts:1,191
Points:159,360
Joined:Dec 2014
Message Posted: Mar 10, 2015 5:14:05 PM

I'm no scientist but it seems to stand to reason that greater inflation means less road contact, and that sounds perilous...
Profile Pic
HotRod10
Champion Author Wyoming

Posts:4,041
Points:70,375
Joined:Oct 2006
Message Posted: Mar 10, 2015 4:22:31 PM

Of course higher pressures help mpg. A few psi over also increases tire life (less sidewall flexing and heat). It does make the ride a little rougher, but I haven't found it noticeable for my vehicles. I run all of mine about 3psi over the recommended on the door panel.

I don't like the ice and snow traction ratings for any of the low rolling resistance tires I've seen. I'll pay a little more in gas for better grip when I need it (which is fairly often around here).

[Edited by: HotRod10 at 3/10/2015 4:26:58 PM EST]
Profile Pic
drydem
Veteran Author Maryland

Posts:355
Points:11,180
Joined:Oct 2011
Message Posted: Mar 4, 2015 7:58:03 PM

btw: low rolling resistance tire do their magic with the roads are dry and smooth. If the roads surfaces are rough with debris or potholes, if the road is wet, icy, or covered with snow OR if roads are graded for traction like mountain side roadways THEN low rolling resistance tires and high tire pressures isn't going to help increase fuel efficiency.
Profile Pic
drydem
Veteran Author Maryland

Posts:355
Points:11,180
Joined:Oct 2011
Message Posted: Mar 4, 2015 7:44:59 PM

Higher tire pressure helps lowers the tire's rolling resistance which is the main energy cost for moving a truck forward under 20 mph and to move a car forward under 40 mph. Add low rolling resistance tires (like Goodyear Fuel Max or Bridgestone Ecopia )and a skilled hypermiling driver with higher tire pressure and this can help boost a vehicle's MPG by over 20% in the summer time. Usually any pressure setting within + or - 5 psi of the maximum tire pressure printed on the side wall of the tire should not cause the tire to prematurely wear or grow old. Most car manufactures recommend tire pressures that are 5 to 10 psi less than the maximum tire pressure on the side wall of the tire so that the tire absorbs some of the road shock/vibrations. As the tire pressure approaches the maximum tire pressure as stated on the sidewall of the tire - more and more road vibration/shockwaves will be transmittted from the tire into the car and steering column - making the ride much harsher when the road surfaces are rough ... As the speed of a truck goes over 35 mph and as the speed of a car goes over 55 mph - the major energy cost for moving forwaard becomes aerodynamic drag and value of low rolling resistant tires become less and less important to fuel usage.

I've done my research and verified the above concepts in the real world. and I've been able to get +70 mpg on a 2010 Prius in the summer time. I'm one of the few drivers listed in t he 3rd gen Prius 800 mile club and I'm in the top 40 for high MPG records in Priuschat.

[Edited by: drydem at 3/4/2015 7:52:27 PM EST]
Profile Pic
Glasman
Champion Author South Carolina

Posts:12,838
Points:1,510,175
Joined:Nov 2006
Message Posted: Mar 4, 2015 10:27:15 AM

yes, but the tires do not last very long..
Profile Pic
JohnCur
All-Star Author New Jersey

Posts:836
Points:637,285
Joined:Feb 2013
Message Posted: Mar 4, 2015 8:23:50 AM

yes
Post a reply Back to Topics