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Midsize Sedans 2.0

13235 messages,  Last post on Nov 27, 2009 at 9:06 AM

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What is this discussion about? Hyundai Sonata, Toyota Camry, Honda Accord, Nissan Altima, Volkswagen Passat, Mazda MAZDA6, Ford Fusion, Chevrolet Malibu, Saturn Aura, Car Comparisons, Sedan

#12773 of 13235 Re: Tire decision help [imidazol97] by m6user Jul 23, 2009 (8:57 am)
Replying to: imidazol97 (Jul 23, 2009 8:06 am) Appreciate the science lesson but have read all those things before. After driving for 40 years and having hundreds of different tires all I can say that I have never had occassion to go anywhere near this long(9 months) without having to add air to the tires. Maybe it is a great tire/great seal more than the nitrogen, I don't really know. It may be just a coincidence that this happened with full nitrogen. My Tundra with Goodrich and the nitrogen has also not needed air added for about 6 months so I guess those must be a great tire/great seal as well. I do check the air pressure fairly often so air temperture really isn't a player.   I have a 07 Mazda6 as well with plain air and have added air to those tires a couple of times a year since new. Usually about 4-5 low when I add. Those are Michelins. I added air to the two vehicles "in question" when they were running the OEM tires quite often as well. So you can see the pleasant surprise I had with the nitrogen. If in fact as you say the nitrogen doesn't add anything to the equation, they should pay the Costco tire installers more for doing such a great job. Replies to this message: bwia (Jul 27, 2009 5:16 pm) akirby (Jul 28, 2009 9:42 am)
#12774 of 13235 Re: Why is the Optima not on this list? [pat] by backy Jul 23, 2009 (9:22 am)
Replying to: pat (Jul 23, 2009 7:41 am) Well, pretty soon we may have a slot open up (Aura). Then cars like the Legacy and Optima can duke it out over the open slot. Replies to this message: ergsum (Jul 23, 2009 10:15 am)
#12775 of 13235 Re: Why is the Optima not on this list? [backy] by ergsum Jul 23, 2009 (10:15 am)
Replying to: backy (Jul 23, 2009 9:22 am) Backy, you always see the silver lining!
#12776 of 13235 Re: Tire decision help [imidazol97] by mickeyrom Jul 23, 2009 (10:22 am)
Replying to: imidazol97 (Jul 23, 2009 8:06 am) Since I have filled my tires with nitrogen,I have had no loss of pressure.That is a fact in my case. Replies to this message: imidazol97 (Jul 23, 2009 12:12 pm) backy (Jul 23, 2009 1:23 pm) mickeyrom (Jul 23, 2009 1:33 pm)
#12777 of 13235 Re: Why is the Optima not on this list? [pat] by mickeyrom Jul 23, 2009 (10:24 am)
Replying to: pat (Jul 23, 2009 7:41 am) I feel like my car is the victim of prejudice Replies to this message: pat (Jul 25, 2009 8:39 am) mickeyrom (Jul 25, 2009 11:00 am) stephen987 (Jul 25, 2009 11:09 am) bhmr59 (Jul 25, 2009 1:01 pm) pat (Jul 25, 2009 8:43 pm) and 1 more...
#12778 of 13235 Re: Tire decision help [mickeyrom] by imidazol97 Jul 23, 2009 (12:12 pm)
Replying to: mickeyrom (Jul 23, 2009 10:22 am) Nitrogen in tires discussion
#12779 of 13235 Re: Tire decision help [mickeyrom] by backy Jul 23, 2009 (1:23 pm)
Replying to: mickeyrom (Jul 23, 2009 10:22 am) Yeah, but have your tires lost pressure? Replies to this message: mickeyrom (Jul 23, 2009 1:33 pm)
#12780 of 13235 Re: Tire decision help [backy] by mickeyrom Jul 23, 2009 (1:33 pm)
Replying to: backy (Jul 23, 2009 1:23 pm) Not so that I noticed.In my Chrysler I used to have to add air constantly,but not since I added the Nitrogen.For me it's been worth it.
#12782 of 13235 Reply to atomic sizes. by imidazol97 Jul 24, 2009 (8:55 am)
>I wonder how this works? Here is a diagram of molecules found in "air". These are by NASA and are supposedly to scale. Note that the oxygen molecule is larger than the nitrogen molecule. In every picture. I would think the nitrogen, being a smaller molecule, would have an easier time escaping from a microscopic hole/leak in the tire/wheel assembly than would oxygen (or other more complex compounds found in regular air).   The oxygen and nitrogen shown are actually atoms; they exist in diatomic form for both. The relative sizes of the diatomic forms may be different than the monoatomic forms imply.   I believe that the quality of the materials of the tire, the seal at the bead, and the valve stem have more to do with the unit not seeping air out (which is 80% nitrogen, remember?) than does the extra 15% or so nitrogen. It makes nice advertising and is sort of like the 30-minute informercials.   I used to have X-Ones on my car and it lost practically no air. I read later that the X-One was used by Consumer Reports as the best quality tire for a long term test on how much air pressure loss occurs. They pumped up tires and then waited months to check the remaining pressures.   Since this topic is off topic for mid-sized cars, I was not going to respond or post again. There's another forum referenced in an earlier post about nitrogen in tires.

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