In the front and rear? Thanks!!!

 

32 psi, according to the sticker on the door jamb.

 

hey has anyone tried Nitrogen in their tires? I heard about it yesterday. Suppose to stay at right psi longer and improve performance! I'm going to go to the shop and try it for giggles!

 

Nitrogen--interesting. Let us know what you think of it and how much it cost. I've heard it's been used in airplane tires for years.

 

i've been filling my tires with about 78% nitrogen for years now

i have heard its more consistent; im not sure how readily available it is though. i'm sure you'll let us know Dan!

 

I work at a airport and have been using it for at least 35 years. Not because it is better it is what we use on the airplanes. But it doesn't change pressure as much as the air does with temp.

 

I add 21% oxygen and 1% other stuff to the 78% nitrogen. Its nice and cheap! lol.

 

The answer is: 32 psi front / 33 psi rear. It's on the drivers door jamb and also in the owners manual.

 

I always thought you were supposed to go by what the tires says, but then again, it only gives the "max" psi. I run about 40 in my car, but I cruize about 75-80 mph on the freeway and sometimes "north of that that".

 

40 sounds too hard. I run the 32 and 33 in mine. I think the #'s on the door jamb are for optimum performance, the car may not handle as well with too much or too little.

 

Your right about it being a bit hard, but from everything that I've ever read about tires and speed is this, if your going to drive faster, increase the psi. If I'm off base, or someone has a study they can post here it would be appreciated because this is the car I'll be "breaking my personal best" in and wanna do it as safe as possible!

 

I think the manual says to go to a higher pressure if you are driving for long distances over 75mph.

 

i don't think you're going to find a study that addresses the ideal psi (if that's what you are asking). there are to many variables related to tire design and vehicle loading and design to come up with conclusive data.

higher pressures will allow the car to corner better. higher pressures generally reduce the rate of treadwear and increase fuel economy. higher pressure also allows the tire to run cooler which is important at high speeds.

on the negative side higher pressures result in a more harsh ride and reduce traction on soft surfaces (e.g. snow) and on uneven surfaces.

40 psi would probably be a good pressure for "breaking your personal best."

 

Kev you're absolutely right. I talked to several tire dealers and most of them admit, that it's just money business. As you correctly said, the normal air contains ~80% N2. You lose pressure anyway. Maybe because N2 is lighter than air the loss it slower. But the as soon as you need to inflate you got to find N2 - and it's never for free.

 

dan,

never tried it but i have heard of it. how much does it cost?

the advantages it provides for a passenger car are probably minimal. you will see it used in tractor trailers because it prevents oxidation to the tire casing allowing for a greater number of retreads. nitrogen produces less heat inside tires and is also supposed to leak out more slowly which should result in more consistent pressures. it is claimed that fuel economy is increased by up to 2% in trucks with nitrogen. some race cars use nitrogen because it allows them to better control tire pressures over the course of a race.

it's also used in airplane tires. i think that's because unconditioned air has moisture in it that will freeze and cause ice accumulation inside the tire since it's cold at higher altitudes.

 

I was running recommended pressures 32/33 in my tires but kept getting the low pressure warning light. I took it to the dealer to have them check out the TPM system and they "fixed" it by putting 36 pounds in all the tires.

Now I get to go back to the dealer so they can fix my passenger side seat belt. I've been having nightmares about it.

 

Your dealer did you no favors by putting 36 psi in your tires. He cured the problem by adding more air than what the manual calls for. The real fix would be to have him calibrate the TPM system. If I remember correctly the owners manual makes mention of it. Good luck.