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not worth paying for.

If they do it for free, fine..... but will you always go back and have them refill it with nitrogen when the pressure drops a bit or it gets cold? If not....don't bother.....


I need to refill tires about every 2-3 months.....add a few pounds ......or if heading north to 20F weather....immediately as will drop 2-3 lbs easily with cold.

t.
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I had my tires filed with hydrogen. Now I'm really flying

I have heard of the nitrogen thing. Car tune-up places and tire stores were advertising it on TV a few yrs ago but I haven't seen anybody pushing it lately. Maybe it didn't go over that well with the public. I know the places I've taken my car to have never mentioned it to me.
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I had my car serviced today and they asked me if I would I like nitrogen put into my tires. I had them do it. Evidently nitrogen is less likely to migrate through tire rubber than is oxygen, which means that your tire pressures will remain more stable over the long term. Racers figured out pretty quickly that tires filled with nitrogen rather than air also exhibit less pressure change with temperature swings. Any of you aware of this? - mendomann

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I have been running my tires on a mixture that is 78% Nitrogen for years. Seems to work pretty well.
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😂
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I remember this coming up on Car Talk several years ago. Tom and Ray were not convinced of how much value it had. They pointed out that compressed air is 80% N.
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My theory -

It is real easy to get "data" showing just about anything is true - even that 100% nitrogen is less likely to migrate through tires than 78% nitrogen (aka air). It is even easier to understand race car teams will use 100% nitrogen when they get paid money to do that.

There are two types of Google hits on this subject:

Type #1 - those based on science. An example
https://en.wikipedia.org/wiki/Kinetic_diameter

Type #2 - Those written by the people selling nitrogen for tires.
https://www.getnitrogen.org/pdf/graham.pdf
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not worth paying for.

If they do it for free, fine..... but will you always go back and have them refill it with nitrogen when the pressure drops a bit or it gets cold? If not....don't bother.....


I need to refill tires about every 2-3 months.....add a few pounds ......or if heading north to 20F weather....immediately as will drop 2-3 lbs easily with cold.

t.
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Well is it worth spending extra $$ to put 100% nitrogen in a tire vs air that is ~78%nitrogen 21% oxygen
1% other?
It is real easy to get "data" showing just about anything is true - even that 100% nitrogen is less likely
to migrate through tires than 78% nitrogen (aka air). It is even easier to understand race car teams will
use 100% nitrogen when they get paid money to do that.


Why not go for some actual test data to evaluate the advantages!
National Highway Traffic Safety Administration DOT HS 811 094
https://one.nhtsa.gov/DOT/NHTSA/NRD/Multimedia/PDFs/Crash%20...
If we take the average of all tires we tested, the use of nitrogen-inflated tires decreased the
amount of pressure lost by 35 percent over the first 90 days, while the advantage of using nitrogen is
predicted to decrease to 24 percent over a three-year period compared to an air-inflated
tire. . .
The study indicated that inflating with nitrogen in place of air had no immediate effect
on laboratory tire rolling resistance. However, it is estimated that at the end of 90 days of onvehicle
service with no inflation pressure maintenance, the improved retention of inflation pressure using
nitrogen versus air inflation will result in a 1.5-percent reduction in tire rolling resistance.


Other often stated advantages are that the filling with nitrogen process results in less reactive lower
water vapor environment. Significant for a high performance aircraft or racing car but of dubious value
for a passenger car.

My take; perhaps worth $5 a tire at most but by far the best thing you can do is check your tire pressure
every 4 to 6 weeks.

RAM
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