I have 3 month old s2k...oem rims, oem s02's...

I lose about 4psi per month on all 4 wheels...I think this is excessive...is it?

 

Well, it's Fall, so this is probably normal. If temperatures are decreasing in your area that can contribute to pressure decrease.
All 4 tires are decreasing at about the same rate, and this is consistent with temperature drop.

When measuring tire pressure, make sure that you keep all variables the same. Use the same tire pressure guage each time. I've seen variations of several psi between good quality pressure guages, and those guages at the gas station are notoriously innacurate. Check the pressure when the tires are cold (e.g. first thing in the morning). Tire pressure normally increases as much as 4-5 psi when the car is driven, so make sure that's not the issue.

 

As a general rule, I've heard the psi changes about 1 psi for every 10 degrees F change in temerature.

 

so, how do we know what psi are tires are really at if different gauges give different readings?
I may think I have my tires at 32psi...but they're really at say 30psi if I used another good quality guage? That sucks.

yea, I always measure on cold tires.

 

 

The brand is called Monkey Grip...got it from Kragens,

I think it cost 7 bucks.

 

[QUOTE]Originally posted by jyeung528
so, how do we know what psi are tires are really at if different gauges give different readings?

 

 

I didn't realize that was so funny - thanks for pointing it out .