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Old 09-18-2012, 05:57 PM   #5
Registered User
Join Date: Aug 2011
Location: Reading, Pennsylvania
Posts: 815
My Ride: 325xi, M3, 325e, 328
Year: 2004
Model: M3
Transmission: 6 speed manual
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"Every month or so I have to add a couple psi", really that is NORMAL for any tire/wheel combination. Outside temperature has a lot to do with tire pressure and tire air pressure is something that should be checked on a routine basis. Under inflated tires heat up more and wear out quicker than a tire that has the correct psi in it. Not to mention that, correct tire air pressure ensures good handling, better ride and longer tread life. As the outside temperatures change now from summer to fall/winter, tire air pressure should be checked at least once a month. Tire air pressure should be checked with "cold" tires, that is, before driving the car as even a short drive will heat the tire up some and give a slightly higher psi reading than a "cold" tire.
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