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Quick question about tire pressure

M

montanafan

Diamond Member
Is it best for gas mileage to inflate your tires to the maximum psi as stated on the tire sidewall? Mine says maximum 35 psi.
 
Always inflate the tires to the pressure that's printed in the doorjam or owner's manual of the car. You may get better mileage by overinflating the tire to reduce rolling resistance, but that will ruin the tire eventually.
 
I checked the doorjam before I inflated them a little while ago, but the sticker had faded to being unreadable. I've decided to park my truck for a while and drive my old '92 Prelude for the better gas mileage. I'll look through the manual tomorrow.

Thanks!
 
Originally posted by: montanafan
Is it best for gas mileage to inflate your tires to the maximum psi as stated on the tire sidewall? Mine says maximum 35 psi.
Click to expand...

Don't inflate your tires to the max PSI; shoot for about 8 PSI lower, because you are supposed to check your tire pressure when they are cold. And yes, going w/ a higher PSI pressure will "improve" your gas mileage, but will also "decrease" rise quality. I hope this helps montanafan 🙂
 
Thanks for the link, rmrf, I hadn't even thought about an online manual. :thumbsup:

myusername, the brand is Kumho. I don't know if that's good or bad, just that they're new and that's a good thing.

Zim Hosein, according to rmrf's link, the tire pressure should be 30 psi, so you were right that I was over inflating them. I had inflated them to 35 tonight, so I'll redo them after work tomorrow. Since I'll be driving about 5 miles before I get to the only gas station on my route with an air compressor, I'll gauge them at about 27 or 28 pounds. Thanks! 🙂


 
Pump them a few psi over what's imprinted on your doorjamb. Don't go beyond that unless you know what you're doing as you're likely to cause uneven tire wear, which would likely negate any gas mileage savings.
 
Change the tire pressure only if you expect sudden changes in load. My car has front pressure recommended from 2 to 2.2 atm, and rear from 2 to 2.7. I always fill them up if I expect a heavy load (and keep them a bit over 2 for normal driving, 2.4 on rear wheels)
 
Originally posted by: montanafan
myusername, the brand is Kumho. I don't know if that's good or bad, just that they're new and that's a good thing.
Click to expand...
Are you joking? Kumho? Have you said this word out loud, slowly?

 
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