adreano17

i saw my mpg. and calculated about 11 mpg..... i need to know what other ES ddrivers' tire psi is and what is the best option. manual says 26 PSI, seems rather low. Tire cold psi reads 44. i need to find the balence between the 2. also. better mpg. also, it is cold here. so keep that in mind on the suggestions. and yes...i know to let my car warm up.

ASG14

iTrader: (1)

26? the manual should say 32....

If your really getting 11mpg, your car has some SERIOUS issues that you need to address. Engine wise, not tire. 11mpg would be racing the car on a racetrack.

adreano17

32 is the psi you would use and in this weather? and overall. i get about 300 miles to the tank. w.o the E light coming on. but 31 miles i think i drove from fillup, and wen i filled it up, it was 2.5 gallons. which is rediculas. what do you think could be the problem?

ASG14

iTrader: (1)

How EXACTLY doy ou figure out your MPG? thr proper way is Miles driven/Gallons pumped into tank.

32 should be what your tires are at in any weather (unless on a race track). When it gets colder, air shrinks, is why air pressure (PSI) will go lower.

Do you have a CEL on?

Wheel Studio

iTrader: (1)

It sounds like you're not computing your fuel economy correctly ~ I highly doubt you could ever get 11mpg during actual driving conditions, even on the track, without a highly modded motor.

Slightly higher pressure (36psi cold or so) may improve your MPG slightly, but at the cost of road noise and bumps/jitters. 32psi or so is what's recommended to keep a stiff sidewall, but still cushion you a little from road bumps, and quiet the ride down. Some will run less pressure during aggressive driving (especially if road temps are down) to get some heat in the tires, but you should be thinking somewhere between 32 and 36 for the best MPG and ride quality.

adreano17

i used that formula. i drove 31 miles (from a full tank) . and put in 2.5 gallons (which will make it full). so 31/2.5=well.....12.4 but still lol. no my CEL isnt on. and never has been. but i checked my psi, both left tires were 40, right was 23. which i kno is terrible. would that significantly affect my mpg like so?

adreano17

good advice. so i should disreguard the outer wall psi?

01LEXPL

iTrader: (10)

In summer time i get ~400ish miles to the tank, winter, 300ish due to heating up the car, etc.

My tires i always have the 'winters' being the OEM size/similar at 2-3 psi more than OEM states... So i have 35 PSI all around where the manual calls for 32.

In the summer, larger rims, i have same thing 1-3 psi more.

285exp

The pressure listed on the outer wall is max pressure, and running it at max pressure will increase your mpg a little bit at the cost of worse tire wear and ride comfort. 32 psi is a good compromise.

To get a better picture of what your mpg really is, you need to track it over several fillups. Your single, small sample really tells you nothing. The auto shutoff on filling station pumps can vary from pump to pump.

ASG14

iTrader: (1)

You can;t figure out your mpg liek that. You NEED to do it as an entire tank. As in, when the gas light goes on. I have a Supercharger on my car and one one occasion still pulled off over 30mpg.

frohboy33

Im getting about 13mpg here this winter. Warming up the car and then taking short trips can kill your mpg. How long do you warm up and how long are your trips? Also where I live gas in the winter does not have to meet as high of quality standards, and this lowers it a little as well. I wouldn't worry about it to much unless your still getting that in the summer.

Lexusfreak

All 4 tires set at 33.5 PSI...with winter tires on...easily averaging 350 miles per tank of regular fuel...that's been consistant the last 6 tankfuls.

dallison

29 cold/32 warm

97'ES

32-34 psi here

adreano17

well i warm up my car for maybe 5 min max. and i drive to school everyday, which is about 10 miles. (i guess in traffic). I just inflated my tires just now to 40 psi all around because i just drove it maybe 8 miles before inflation. based off that, i know psi increases after being driven for a while. therefore, it should put me in the 34-36 range.