Checking Spare tire Air - Toyota Yaris Forums

Yaris Hilton · 04-28-2010, 03:34 PM

Carrying a compressor is a good idea.

It's false that nitrogen is denser than air. It's a little less dense. Gases' densities are directly proportional to their molecular weights. Air (dry) is approximately 78% nitrogen, around 21% oxygen, with various trace gases making up the rest. Oxygen's molecular weight is about 32, nitrogen's 28, so air with its oxygen content is a little denser than nitrogen. I doubt you could measure a significant difference in the leakage rate. Nitrogen's a current "snake oil" fad for the most part.

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04-28-2010, 03:34 PM	#17
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Carrying a compressor is a good idea. It's false that nitrogen is denser than air. It's a little less dense. Gases' densities are directly proportional to their molecular weights. Air (dry) is approximately 78% nitrogen, around 21% oxygen, with various trace gases making up the rest. Oxygen's molecular weight is about 32, nitrogen's 28, so air with its oxygen content is a little denser than nitrogen. I doubt you could measure a significant difference in the leakage rate. Nitrogen's a current "snake oil" fad for the most part.