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#2
12-02-2008, 12:56 AM
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Take the tire pressures from the label on your driver's door jamb. If your tire size isn't listed, use the closest tire size.
Using nitrogen has no impact whatsoever on ride quality. Plain old air is mostly nitrogen in any case. All you get out of nitrogen is less chance of water (it is dryer), nice green valve caps, and a thinner wallet.
__________________
2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue 
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#3
12-09-2008, 10:05 AM
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In addition to no flucutation in pressure due to hot or cold running temps
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#5
12-10-2008, 04:39 PM
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Quote:
Nitrogen actually expands at the same rate as air, so it is not true that you get no fluctuation in pressure between hot and cold. There is no significant difference between the two. If you are following the pressure recommendations that BMW issues, they are only valid for cold tires, whatever is inside the tire. What you may get with nitrogen is more predictability in that expansion and pressure increase. The issue is that plain old air can have moisture in it if the compressor isn't maintained properly, and it is the moisture that expands at a greater rate than the air. Thus, wet air is less predictable.
__________________
2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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#6
12-10-2008, 05:04 PM
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It's a gimmick at best when you are talking about a street car/daily driver. take your wife out for dinner instead.
__________________
- 335i E92 2007 [Sapphire Black/Coral Red] - X5 E70 2013 [Sparkling Bronze/Cinnamon] "Living the dream" 1981 Delorean #6489 
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#7
12-10-2008, 07:24 PM
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The air you breathe is 78.084% nitrogen.
__________________
E70 X5 3.0si Space Grey E36 Z3 2.5i Roadster, Sterling Gray Metallic
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#8
12-10-2008, 10:13 PM
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> no flucutation in pressure due to hot or cold running temps
Not unless someone has repealed the Ideal Gas Law: http://www.chalkbored.com/lessons/ch...aw-handout.pdf Last edited by Penguin; 12-10-2008 at 10:22 PM.
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