Nesbittaudia4

I bought a 2008 TL / nav in a few months back and its the first car I have ever owned with a TPMS. In my previous car (2001 TL), I used the very scientific method of filling the tire up if it looked low

So, for all those with knowledge about this stuff, if the sticker in my door says 33 psi for the front and 32 psi for the rear, does one or two tires being at 34 or 35 have any effect of the wear or the mpg or anything really?

The 34 or 35 I am referring to is all at driving temperature.

Have it experts, enlighten me.

avs007

The sticker on the door is cold temp... When it's warmed up, it will be higher. Depending on where you got your air and how much water vapor is in it, it could be MUCH higher when warm.

Bearcat94

Not everyone runs the psi recommended on the door sticker. It's pretty common around here for people to run 2 or 3 or even 5 psi (cold measurment) over that recommedation.

Find what you like within a few pounds of the recommendation. You don't want to go to high or too low as that can cause uneven wear, poor mileage, etc.

Nesbittaudia4

Oh..thats cold temp? Interesting. It probably says that on there haha.

I'll have to look at it in the morning. Thanks

vietxquangstah

iTrader: (7)

I have 235/45-17 Continental DWS on my TL and I air my tires to 35 psi cold, so when I drive and it heats up it sits around 35-37PSI.

The reason why I air it to that PSI is because the Continental DWS are notorious for having a soft sidewall so slightly increasing tire PSI somewhat makes up for it, but not by much at all.

I still get 23-29MPG short highway trips (~30-45 minutes)

Nesbittaudia4

I currently get about 34 mpg on the highway with the cruise set at 70 -72.

Bearcat94

Also the psi reported by the TPMS on the MID may off by a pound or two. You need to set your pressures with a decent guage. Then compare what your guage says to the MID display. 3 of mine are spot on and 1, as near as I can tell, is off by about 1/2 psi.