MPG and PSI what's yours? - Toyota Yaris Forums

WRX · 10-04-2014, 12:45 AM

I have just recently realized that an increase in psi helps my handling and my mpgs. 185/55/15 on Konig feathers TRD shocks springs an rear sway. Ran my tires at 28 psi for a cush ride got 23 mpg city. Per each tank. Now at 34 psi all around and mpgs 27 city and I can corner a lot faster/ firmer. Continental tires 44 psi max rated. Just wondering what others got with different tire sizes etc. Freeway idk my figures I do mostly city driving. My driving style is spirited.

nookandcrannycar · 10-04-2014, 03:35 AM

I used to run 38-40 PSI, but lowered to the Toyoita spec 32 PSI last year. I now average a bit over 40 MPG and the higher PSI level I used to run was only a very slight bit above that.

IllusionX · 10-04-2014, 09:31 AM

28psi is low..

bronsin · 10-04-2014, 02:49 PM

35 psi and ~36 mpg never drive more than six miles. MPG will be lower in winter at least in NJ.

beaker · 10-04-2014, 03:18 PM

Running 17 inch DE Edge wheels with 205/40/17 Atrezzo tires. Ran 32 psi for a couple of tank fulls at first when I put the new wheels on, got average 34 mpg. Bumped it up to 36 psi right now, average is around 36 mpg. Haven't gone any higher on psi. On stock steel rims with 185/60/15 tires at 35 psi, I was averaging 39 to 40 mpg.

I don't lollygag around town. I run 70 to 75 mph on expressway, 100 miles a day back and forth to work. Otherwise, would get run over in Atlanta traffic.

malibuguy · 10-05-2014, 10:21 AM

usually between 54-56 psi on either my summer or snow tires. I used to run 63psi in my old xB1 tires

If i know icy conditions are favorable I drop the snow tires to 38lbs

ive had like 20 tanks that averaged over 50mpg with a best of 54mpg.

lately I havent cared as much and been only getting 47mpg...which reminds me I really need to enter in my gas recipts into EcoModder...i have a pile of them

why? · 10-07-2014, 07:40 PM

I haven't a clue what my tire pressure is, I assume it is 32 like the door says. Last tank was 46 mpg.

sheekeebut · 10-07-2014, 08:39 PM

36 psi fronts 38 rears. 7.3 l/100 km (32 mpg) because I love stop-and-go traffic and turns at every intersection.

mirapatec · 10-08-2014, 02:54 PM

I am running with 35 PSI at this time. My current fuel economy is in the Fuelly banner below.

JimKellyfan · 10-14-2014, 04:14 PM

I run max in front, and a few pounds less in back (these particular 15's, crap S rated came with car) I run at 44 psi front and 40 rear, typically empty-ish load wise. Get 28-33 city and 38-41 highway....also spirited driver....

Kar98 · 10-16-2014, 07:09 PM

Quote:

Originally Posted by malibuguy

usually between 54-56 psi on either my summer or snow tires. I used to run 63psi in my old xB1 tires

Great Scott!

Exiwolfman · 10-16-2014, 08:38 PM

Quote:

Originally Posted by malibuguy

usually between 54-56 psi on either my summer or snow tires. I used to run 63psi in my old xB1 tires

If i know icy conditions are favorable I drop the snow tires to 38lbs

ive had like 20 tanks that averaged over 50mpg with a best of 54mpg.

lately I havent cared as much and been only getting 47mpg...which reminds me I really need to enter in my gas recipts into EcoModder...i have a pile of them

wow ..plain and simple and dont take this the wrong way but running tires at ur pressure is stupid and dangerous just to save on gas

The car is to be at specified tire pressure of 32 psi tires can take a max of on average 44 psi unless ur running E rate truck tire rated for 80 psi under max load . I honestly dont get ppl and i see this quite often , keep in mind the four patches under ur car is all u have from hitting a tree lol

why? · 10-16-2014, 10:44 PM

Quote:

Originally Posted by Exiwolfman

wow ..plain and simple and dont take this the wrong way but running tires at ur pressure is stupid and dangerous just to save on gas

The car is to be at specified tire pressure of 32 psi tires can take a max of on average 44 psi unless ur running E rate truck tire rated for 80 psi under max load . I honestly dont get ppl and i see this quite often , keep in mind the four patches under ur car is all u have from hitting a tree lol

32 psi is what the Toyota says for comfort, not what the tire manufacturer knows their tires can handle.

44 psi the max? Actually tires have different cold maximums on the sidewall.

10 extra psi is not going to harm anything. Tires must take much more so manufacturers won't be sued over exploding tires on highway in 100+ degree weather.

Exiwolfman · 10-16-2014, 10:56 PM

Quote:

Originally Posted by why?

32 psi is what the Toyota says for comfort, not what the tire manufacturer knows their tires can handle.

44 psi the max? Actually tires have different cold maximums on the sidewall.

10 extra psi is not going to harm anything. Tires must take much more so manufacturers won't be sued over exploding tires on highway in 100+ degree weather.

True to a point but keep in mind a tire that is over inflated does not preform as intended .
Our car are to run at 32 for best of both worlds and a tire with 10 psi over the max is asking for trouble as u drive tire gets warm pressure goes up and so on.
I have seen first had what happens to tires that are over inflated and would hate to have a blowout while on a hwy and don't forget the wear and just a waist of tires just so u can get few more miles out of a tank.
Tire pressure can make or brake a car in how it drives ,handles etc do what u like I say but be safe about it not stupid cos of being cheap cos in the long run u pay more.
Just my 2 cents on that

sent from my S4 on Mars

Hershey · 10-16-2014, 11:07 PM

The Altimax RT43 are 51 max . Still keep tires 34 > 36 for any tire . Didn't see much benefit in high p.s.i., only stiffer ride . During colder months try to keep them at 36. So when air pressure drops on those very cold nights or days they're slightly above or at 32 .

kou · 10-18-2014, 04:51 PM

35psi in the tires and 10psi in the motor I average 36mpg.

harda toenail · 10-22-2014, 04:25 AM

36 PSI. 36 mpg. 50/50 city/highway

jay cobbs · 10-23-2014, 11:46 AM

I played a little game with myself when I first got my sedan yaris. Wanted to prove that if you drove like a prius and pumped the tires to about 36-39 psi that I could break the 35mpg in city. Remember I have a automatic but after learning about the yaris and prius having the same gas engine trick called DEFCO ( De-accelerate engine fuel cut-off ) at about 900-1100 rpm on the motor when slowing or "gliding " from stop to stop I got up to 41 mpg IN TOWN....YES, It is possable to do it with a auto. Yes, you will learn to listen to your motor just like a motor cycler does and back off the "petal" some. You must use TOP TIER GAS to pull it off ( Union 76-Chevron- or arco mid grade will work) and slowly start from stops with rpms below 1900. Have fun exploring what a YARIS is really built for...Endless possibilities and F U N. Enjoy

10-04-2014, 12:45 AM	#1
WRX Drives: 2012 YarisLE 2014Lexusct200hF Join Date: Dec 2013 Location: San Francisco Posts: 17	MPG and PSI what's yours? I have just recently realized that an increase in psi helps my handling and my mpgs. 185/55/15 on Konig feathers TRD shocks springs an rear sway. Ran my tires at 28 psi for a cush ride got 23 mpg city. Per each tank. Now at 34 psi all around and mpgs 27 city and I can corner a lot faster/ firmer. Continental tires 44 psi max rated. Just wondering what others got with different tire sizes etc. Freeway idk my figures I do mostly city driving. My driving style is spirited. Last edited by WRX; 10-04-2014 at 12:48 AM. Reason: more info

10-04-2014, 09:31 AM	#3
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,888	28psi is low.. __________________

10-04-2014, 02:49 PM	#4
bronsin Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008 Location: nj Posts: 4,790	35 psi and ~36 mpg never drive more than six miles. MPG will be lower in winter at least in NJ. __________________ Synthetic Oil: Its All In Your Head

10-04-2014, 03:18 PM	#5
beaker Drives: 07 Yaris 3 door Join Date: Feb 2013 Location: conyers ga Posts: 87	Running 17 inch DE Edge wheels with 205/40/17 Atrezzo tires. Ran 32 psi for a couple of tank fulls at first when I put the new wheels on, got average 34 mpg. Bumped it up to 36 psi right now, average is around 36 mpg. Haven't gone any higher on psi. On stock steel rims with 185/60/15 tires at 35 psi, I was averaging 39 to 40 mpg. I don't lollygag around town. I run 70 to 75 mph on expressway, 100 miles a day back and forth to work. Otherwise, would get run over in Atlanta traffic. Last edited by beaker; 10-04-2014 at 03:35 PM.

10-05-2014, 10:21 AM	#6
malibuguy Obsessed with 1.5L Drives: '10 PW Yaris Sedan Join Date: Feb 2011 Location: Westminster, MD Posts: 907	usually between 54-56 psi on either my summer or snow tires. I used to run 63psi in my old xB1 tires If i know icy conditions are favorable I drop the snow tires to 38lbs ive had like 20 tanks that averaged over 50mpg with a best of 54mpg. lately I havent cared as much and been only getting 47mpg...which reminds me I really need to enter in my gas recipts into EcoModder...i have a pile of them __________________ -Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr

10-04-2014, 03:35 AM	#2
nookandcrannycar Drives: 2('14+'07)MT 3d ,wHandCrWndws! Join Date: May 2009 Location: S.MontgomeryCnty,TX(HoustonMSA) '07=BayouBlue=300,125miles=OrigOwnr '14=ClassicSilvr=29,059miles Posts: 4,839	I used to run 38-40 PSI, but lowered to the Toyoita spec 32 PSI last year. I now average a bit over 40 MPG and the higher PSI level I used to run was only a very slight bit above that.

10-07-2014, 07:40 PM	#7
why? Only Happy When it Rains View User's Garage Drives: Yaris LB Join Date: Jan 2006 Location: harnett county NC Posts: 4,097	I haven't a clue what my tire pressure is, I assume it is 32 like the door says. Last tank was 46 mpg. __________________ Colin Chapman disciple

10-07-2014, 08:39 PM	#8
sheekeebut Minimalist Drives: 07 silver sedan Join Date: Jun 2014 Location: Mississauga, GTA, Toronto, ON Posts: 432	36 psi fronts 38 rears. 7.3 l/100 km (32 mpg) because I love stop-and-go traffic and turns at every intersection.

10-08-2014, 02:54 PM	#9
mirapatec View User's Garage Drives: 2012 Yaris L, 2020 Yaris LE HB Join Date: Jan 2013 Location: Georgia, U.S.A. Posts: 211	I am running with 35 PSI at this time. My current fuel economy is in the Fuelly banner below. __________________ 2012 Toyota Yaris L and 2020 Toyota Yaris LE HB

10-14-2014, 04:14 PM	#10
JimKellyfan Drives: 2010 Yaris Sedan Join Date: Oct 2013 Location: the good Carolina Posts: 173	I run max in front, and a few pounds less in back (these particular 15's, crap S rated came with car) I run at 44 psi front and 40 rear, typically empty-ish load wise. Get 28-33 city and 38-41 highway....also spirited driver.... __________________ 2010 Yaris sedan, TRD CAT back (sport muffler only, really), OBX header (relocated front AF sensor to front pipe), OBX throttle plate spacer, K&N filter (in stock air box-for now), TRD struts and shocks, Mexico Rough Road Springs x 4, new Yota sway bar links front, slotted/drilled rotors and Maxx brakes front, Valvoline synthetic brake fluid, 3M undercoated, 16" Konig Feathers Michelin Pilot Sport AS 3 + Tires TRD rear sway bar, 4 GT Spec bars including: front strut brace 2 point, 4 point ladder brace, mid chassis brace and rear lower tie brace, rear hitch, [B]

10-16-2014, 11:07 PM	#15
Hershey Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009 Location: northeast Posts: 2,897	The Altimax RT43 are 51 max . Still keep tires 34 > 36 for any tire . Didn't see much benefit in high p.s.i., only stiffer ride . During colder months try to keep them at 36. So when air pressure drops on those very cold nights or days they're slightly above or at 32 .

10-18-2014, 04:51 PM	#16
kou View User's Garage Drives: 08 lb Join Date: Aug 2007 Location: nj Posts: 935	35psi in the tires and 10psi in the motor I average 36mpg.

10-22-2014, 04:25 AM	#17
harda toenail Drives: Want a yaris Join Date: May 2012 Location: SE Missouri Posts: 132	36 PSI. 36 mpg. 50/50 city/highway

10-23-2014, 11:46 AM	#18
jay cobbs Drives: 2010 yaris sedan 4 speed auto Join Date: Apr 2012 Location: union city,ca. Posts: 58	I played a little game with myself when I first got my sedan yaris. Wanted to prove that if you drove like a prius and pumped the tires to about 36-39 psi that I could break the 35mpg in city. Remember I have a automatic but after learning about the yaris and prius having the same gas engine trick called DEFCO ( De-accelerate engine fuel cut-off ) at about 900-1100 rpm on the motor when slowing or "gliding " from stop to stop I got up to 41 mpg IN TOWN....YES, It is possable to do it with a auto. Yes, you will learn to listen to your motor just like a motor cycler does and back off the "petal" some. You must use TOP TIER GAS to pull it off ( Union 76-Chevron- or arco mid grade will work) and slowly start from stops with rpms below 1900. Have fun exploring what a YARIS is really built for...Endless possibilities and F U N. Enjoy

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