Originally Posted by
Mark
Put 40 psi in all four tires.
Originally Posted by
Dirk Diggler
I put 30 psi in all 4 just now.
Hey Dirk...I assume you meant to say 40 like Mark suggested?!?
If you have a tire that shows 30 PSI at normal daytime temperatures right now in Atlanta, it could easily drop 3-4 PSI during overnight temps...which puts you into the TPMS warning range of less than 27 PSI.
Other factors that you may want to keep in mind...
- If you are checking the tires in the middle of the day when it's warm, they will be at their highest PSI.
- If you are checking the tires right after the car has been driven, they will also be at their highest PSI (tires get warmer when driven).
- If you are checking tires after they've been sitting in direct sunlight for a while, they will be at a higher PSI. Direct sunlight hitting a black tire makes them warmer.
- TPMS sensors aren't 100% accurate. You could have one that is off by 1-2 PSI.
- Your air pressure gauge may be a piece of junk. If it's a $0.99 stick-type, it's probably not super-accurate.
- Don't rely on the air pressure gauge of a gas station air pump or other inflation device. Use a quality pressure gauge.
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)