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Once inflated, resetting the TPMS monitor is just a couple of taps on the touch screen.
My new tires were inflated with nitrogen, but I didn't notice them maintaining pressure any better than regular air (though of course, I haven't sent the samples off to the lab.. lol)
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Actually several years ago I started reading the ads for various machines that enriched the nitrogen in the air for tire stores. Most were theoretically able to "enrich" the percentage of nitrogen to a certain level, let's say 90%, but that was when tested under ideal circumstances by the manufacturer. The biggest part of the advertising was how they could make a lot of money selling the idea to the customer.
The only benefit was for trucks where the tire casings are reused many times. The reduction of oxygen inside the tire supposedly extended the life of the rubber and the fibers. This is over hundreds of thousands of miles and years.
2014 Malibu 2LT, 2015 Cruze 2LT,
I suspect that the biggest difference isn't the gases themselves, but moisture in compressed air. The temperature changes have a huge effect on water vapor, so if that drops out of the equation, then the pressure will drop substantially when the tires are below freezing.
The one other factor the companies selling the nitrogen concentrators use is the concept of water vapor inside the tire and how nitrogen has no water vapor. Neither does "air" if it's been pumped in through a dehydrator to remove much of the water vapor just like the concentrators for nitrogen remove water vapor.
However besides this changed variable for comparing the two gas mixtures in tires, the companies selling try to pretend there's liquid water inside the tire carcass. And that this water turns to vapour due to the tire temperature during high speed runs and the change from liquid to vapour causes the water to expand (without looking up I think it's on the order of 1000 times in volume under STP) and that expansion causes all sorts of failures on race cars.
Note the link is from a company pushing , daaah, daaah, wait for it... nitrogen concentrators.
https://www.getnitrogen.org/sub.php?view=nascar
2014 Malibu 2LT, 2015 Cruze 2LT,
Tire Discounters, Discount Tire, Sam's, Costco.. all have it.
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The only reason I care about 35 psi versus 25 psi during winter driving is if it causes the TPMS to act up (which it will). The Q7 is no issue: I just reset it and the system says "are you SURE you have the right pressure in there?!" I say, "yep." done. In the spring, I must do the same thing when I swap to the summer set, but, again, it's surprisingly easy (for an Audi). On the Forester, the stock set of wheels is the only set that has TPMS in it. The sensors will probably start to go bad within the next couple years, so once they do and the light just stays on all the time, then I can tell my wife that it's a forever thing and to just ignore it.
In the meantime, I do like that the tires keep a closer-to-constant pressure.
One thing I miss on our Volvos is the individual tire pressure read outs. It only has green dots to indicate “ok”. They cheaped out.
2025 Ram 1500 Laramie 4x4 / 2023 Mercedes EQE 350 4Matic
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Not fair! Hahah
I'll remember that when I'm in the region this summer. "Honey, we need to divert to Cincinnati for the afternoon.... I know it's out of the way, but I need to add some air to the left rear, and I have it on good authority that the air stations work there. Plus, they will take our card!"
Seriously, though... even the "fancy" ones at Fred Meyer (fancy, yet broken), take quarters. At least, it did the last time one worked!
On foot today, I am still amazed by the amount of cars with studded tires - and people wonder why the roads here can be rough. Freeze/thaw doesn't help, but neither does 4 studs on a Yukon.
In reality, even if it snows they'll probably be able to keep the road open this late in the season.
Funny thing, I am living in what is effectively the NYC of the inland northwest, and it still has a small town vibe compared to the Puget Sound rat race, even though in population it is definitely not small.
I woke up at 0630, went outside, and switched the electrical cord from the built-in battery trickle charger, which had been plugged in for the last six weeks as the car sat, over to the block heater. After packing a few things for an overnight and getting ready for the day, I headed outside to start the car and give the animals water. However... car was totally dead. Like, it was TOTALLY dead. So, lesson #1: Don't assume that your trickle charger is worth a darn.
I then had to start up the Forester and bring it over to jump the Q7. But, Q7 takes a lot of amps to crank it, and the Forester cannot do this without help from the Q7's monster battery. After an initial try, I let it sit for 30 minutes or so to give it some charge. Afterward, I got an effort to crank, but it just wasn't there yet.
I tried the battery-based instant starter, but it wasn't able to juice it either. I took that inside to recharge it while the Forester was still charging the car's battery. Then, 30 minutes later again, I tried once more. At this point, it's around 10am, and I'm getting a little nervous about the time (remember I was trying to get the car to Anchorage before 1800 just in case I ran out of miles for the restart lockout before I arrived). I try to start it again, and I'm getting nothing - it's not even turning 'on' when I press the button or turn the key.
Reading up on that issue, I find out that, most likely, the immobilizer kicked in due to it not recognizing the key. Seeing a little red light flashing on the fob, I decided to swap out the battery in the fob unit; this makes no difference on the car. More reading online, I am starting to get frustrated because many "sources" are saying that an Audi lockout requires a flatbed to the dealer for recoding the car and keys. I'm partly disbelieving, because not even VAG could do something that moronic! I read up on several other DIY reset procedures, most of which involve jumping on one leg and barking like a dog, and none work. Finally, in desperation, I decided to disconnect the onboard battery, which is located under the driver's seat. Only trouble is, the car was not in a particularly accessible location for doing that job because the driver's door could only open about 1/3 the full distance due to having it tucked up against my pickups to keep it out of the way.
However, perseverance paid off because after disconnecting it for about 10 minutes and letting the whole system reset, not only would the car turn on again, but it also started up! For five seconds, then it died.... And, it didn't have enough juice to try to start again. So, ANOTHER 45 minutes of charging later, I first tried to start it with the instant starter, the car sputtered a lot but no connect. Then, I hooked the Forester up to it again, revved the engine to about 3500 RPM while I was trying to start it, and success. But, it ran really, really rough for a few minutes, smelled awful, and finally leveled out. Check engine light came on, TMPS, traction control.... pretty much every light. I said, "screw it," hopped in, and drove to Anchorage.
They gave me a 2021 Q5 for a loaner in a really pretty dark blue. My favorite shifter type; but, I only put it into reverse while trying to put it into park, um, EVERY time I tried to park it. LOL /facepalm
The drive home was a whole different world than the drive down: Yesterday, the weather was good, roads clear, trip took about 6'45" in total time with 45 miles remaining before the countdown timer ended. Today, it was freezing rain from Anchorage all the way to Trapper Creek (about 120 miles) and reasonably slippery, especially on all-seasons. I saw dozens of VIDs (vehicles in distress), about a dozen with people in them (e.g., just happened), and a couple dozen older incidents with nobody on site any longer. I saw two people go off the road in front of me, with one guy nearly rolling his pickup, but somehow not, amazingly. I stopped for him, he had a cell and called for a pull out. I had my ropes on board, but I'm in the loaner, so.... A mile down the road a little Suzuki Vitara starts wagging the back end for no apparent reason, loses it just as I'm by him, and does a couple 360s before coming to a stop in his own lane, facing the correct way, and somehow everyone else on the road (and there were lots of us!) did not hit him. Lucky guy.
After Trapper Creek, it was snowing heavily for about 100 miles.... and lots of snow! Wet, heavy, slow, white-out conditions. What a mess. Much of it was 25-45 miles per hour, and sometimes that even seemed to be pushing it.
The car doesn't look quite as pretty now as it did when I picked it up this morning with a whopping 270 miles on it. I've more than doubled those already....
Video is raw, so sorry for the crude sound, etc. This was after an hour of this weather and limited progress, with at least another hour to go.
Chances are pretty decent I'll have wet roads at worst. Tires are still good and I have AWD, not too worried. I am heading out first thing Friday also will be driving around the sound a bit, not looking forward to the old rat race traffic.
I think it will be a couple weeks. They said, "It should be ready on Friday, but we'll give you a call once we can get into it." I agree; it's a real PITA to take it down there. But, it's either that or pay $$$$$ out of my own pocket to keep fixing these reductant system issues.
I swear, once the scandal warranty runs out in another 15,000 miles, the first system failure I have on it will result in me disabling it for good. I like the addition of the reductant, but not that much.
Speaking of the scandal, I got a couple MB Bluetec class action forms in the mail - even though I only leased, the cars never needed a modification or had any mechanical trouble at all. Ambitious lawyers, gotta love it.
These days with wacko trade in values, I wonder what it could score.
Just remembered an odd thing - I was passing I think an older Dodge truck or Durango around Ellensburg, flow of traffic so moving by slowly (maybe had even been passed and was passing again), and I noticed the driver moving around. He was looking at me and doing something, I first thought flipping me off or some other gesture, but then realized he was giving me a peace sign and didn't have an unhappy look on his face - maybe he liked the car or one of the couple (small) window stickers or something? Not a typical sight.
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2025 Ram 1500 Laramie 4x4 / 2023 Mercedes EQE 350 4Matic
Worse than those who speed up while you are passing are those who come up behind at a few mph faster.
I move to right for them to pass and they continue but slow without passing so they stay abreast or at my
rear bumper. They don't want to be first in case there's a policeman ahead, but they want to push someone
from behind. I often look for a lapse in their car's speed giving a little room, then I pull over back where I was in front of them. Continue for a minute at my previous speed and then slow by 1 mph on the cruise if they
don't decide they actually wanted to go faster than I'm going, which I had pulled over earlier to enable their doing.
LOL
2014 Malibu 2LT, 2015 Cruze 2LT,
Yeah, those who camp out in the blind spot are irritating, too. I recall one of those over the weekend, I moved over to let them by (cruise on), then they got about even with my rear wheels, and sat there. I'll admit I do like to have a speeder or two in front of me, with a gap - let them "run interference", so to speak.
2017 Cadillac ATS Performance Premium 3.6
Well, sorry, Mr. Inconsistent Driver, but if you were going faster than me on the whole *before* I passed you, I never would have caught up to you. Sometimes, they will finally pass and just move it on out, which is great (I'm happy I could help wake them up!). Other times, they will pass when there's an extra lane or something, only to hold me up a mile or two down the road. In those cases, I just pass them again immediately, settle back in to my speed, and let them eat my exhaust.
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2015 Subaru Outback 3.6R / 2024 Kia Sportage Hybrid SX Prestige
Yes, primarily one lane each direction, with some areas that have additional dedicated passing lanes.
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2015 Subaru Outback 3.6R / 2024 Kia Sportage Hybrid SX Prestige
That would never fly in most other areas of the country.
I remember on the interstate through Montana I parked the cruise on 84 MPH and never touched the pedals for 90 miles.
Very calm easy driving.
2025 Ram 1500 Laramie 4x4 / 2023 Mercedes EQE 350 4Matic
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2015 Subaru Outback 3.6R / 2024 Kia Sportage Hybrid SX Prestige