tha5150

Just got a 2015, had a few lb's less on the front left tire. evened them all out at 42lb each last evening. this morning on my 30 min drive to work, all the others stayed at 42 while the one i was working with last night changed to 47psi..

also, when i bought it i had the dealer check them all cause it seemed one was a little lower.. it has ran kind of rough on the road past 50mph.. I am wondering if i possibly mixed the Nitrogen and regular air in the tires and is what caused this. also is this why the 42 to 47 change in a 30 min drive.

Lastly i know you can look on the cap and should be green but these are all silver caps with no green, though they are the nice ones like you would find with the nitrogen. Assuming i did have Nitrogen and I wanted to switch to regular air, would i have to change out the valve stem? Couldnt i just put a block on the front and then rear, remove the nitrogen and put air in there or do i need something else?

Guys, i feel more and more stupid as i type this up but i have never dealt with Nitrogen in my tires..

DefconFrat

Air is 79% nitrogen as it is, so I'm not sure you'd need to do anything different.

Ricktwuhk

I would have Googled this before posting...

Nitrogen filled tires fluctuate less than air filled tires. Of course air is 78% nitrogen. Simply top off your tires with air. A normal increase in tire pressure from highway driving is 4 pounds at most. The TPMS is not a tire gauge. It is not as accurate. You should check the tires cold (3 hours not driving, and not sitting in sunlight), then put in the air specified on the door sticker. 42 is too high for a normal passenger tire.

Valve stems are the same, caps are simply a different color, nothing "nice" about them. No, you don't drain out the nitrogen.

If a tire is rough at speed, it's likely unbalanced.

tvsjr

The real worry is if you mixed summer nitrogen with winter air. That could be very bad.

centexlimited

My new escalade came with nitrogen. It was delivered in from another dealer.
Local dealer said they don't mess with that gimmick. Anyway not
going to find nitrogen around here, even discount tire. So good ole
regular air, is just fine.

Ricktwuhk

Absolutely. Near explosive.

FordGate

Filing tires with "Nitrogen" is about as useful as a can of SeaFoam.

tha5150

my concern was summer Nitrogen, then winter air and then this morning it heated up. not to mention a few WOOT. Yeah, lucky i didn't go kaboom! LOL

Jokes aside guys, i do realize its not a big deal but more of a questionable thing and trying to figure out why the 5 psi change in 15 miles of driving and only that one tire was changed. All other psi's stayed the same.

I came from a 2002 Tahoe with a damn tape deck, so the technology and all the gadgets, i just need to become a little more up to speed so to speak.

FordGate

Wait several hours if not overnight. Measure them all again, with a gauge, then even them out. Do NOT put more PSI than the door sticker specifies! 42 is WAY too much pressure.

tha5150

Thanks, will do. I will make adjustments this evening after its been sitting for a few hours. I do believe 35 is what is on the door