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Tire Pressure

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Old Feb 12, 2004
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Tire Pressure

I normally set my stock tires at 30psi. I just went to the shop, and they told me that with modern cars, they usually set the tire pressure at 40psi.

This could be the solution to my somewhat low gas mileage average of 26mpg.

Thought that you guys should know this, so you could adjust your tire pressure accordingly.
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Old Feb 12, 2004
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i run mine at 35 psi. no problems here
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Old Feb 12, 2004
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Tire pressure is determined by veichle weight. so Psi Varies from car to car.

On the drivers side Door frame, there will be a sticker that tells you what Psi to run the tires at, based on the cars weight. I believe its 30 Front and 30 Rear for our civics. bump 1 to 2 psi per wheel sized increase. (for 17s run 32-34)
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Old Feb 12, 2004
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^^ agreed.

over inflating will NOT increase your gas mileage. "Overinflated tires can make your car ride more harshly, are more prone to damage from road hazards, and wear unevenly." pg. 241 on the manual.

Improper inflated tires can cause a crash.
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Old Feb 12, 2004
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I love the tire rack....

Hers a few articles to help explain it a bit more

Air Pressure
Air Pressure Vs Dry performance
air pressure Vs Wet performance

Air pressure for Compititon (this is for Autocross and track days, not drag racing)
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Old Feb 12, 2004
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Old Feb 12, 2004
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Re: Tire Pressure

Originally posted by PJG
I normally set my stock tires at 30psi. I just went to the shop, and they told me that with modern cars, they usually set the tire pressure at 40psi.

This could be the solution to my somewhat low gas mileage average of 26mpg.

Thought that you guys should know this, so you could adjust your tire pressure accordingly.
--> Moving this to Tire/Wheels forum ...

40 psi sounds too high ... you're gonna wear out the middle of your tires real fast at this pressure. Not to mention having a super harsh ride and probably less control of your car.
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Old Feb 12, 2004
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tirerack rocks! Except they don't carry falkens
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Old Feb 12, 2004
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Actually putting the stock firestones up to 40psi, is good times, they turn in very nicely, and don't roll over, when they're down at 30, they suck, I drove mine at about 36-37F/32R, and they had mostly uniform treadwear, though they wore out in 20k miles cause of hard driving.
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Old Feb 14, 2004
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well with low pros you need to set at least 40 right?
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Old Feb 14, 2004
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Originally posted by Samari
well with low pros you need to set at least 40 right?
Not necessarily.. Depends how low..
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Old Feb 15, 2004
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19" 215/35 runflat=??? i run 34 front and 33 rear on my sedan is that enuff?
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Old Feb 15, 2004
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will, its a matter of preference

i canyon run and road race with my azenis(205/50/15) at 38 psi(hot)

i road raced my civic with stock firestones before at they seem to
work best at 34 psi(hot)
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Old Feb 15, 2004
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I ran 40 cold for a while... those were fun, they were very responsive
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Old Feb 16, 2004
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After driving my car,
The ride was pretty good, and gas mileage slightly increased, so I just left the tire pressure at 40psi.
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