How hard do you think it is? Remove the valve core, air escapes, replace valve core, and air 'em up. A few minutes and your done.

 

Naturally, the weight of the car would push much of the air out. But you would still have some air in the tire, leading me to believe (theoretically) they've have to vacuum out all the air before replacing with nitrogen.

 

is due to the turbo. With colder air the oxygen content is already compacted/compressed, the turbo action which is compressing the air even more, is telling the engine it needs more gas. The extra gas is mostly wasted since it is being used to keep the cylinders from overheating. The ECU is compensating for the extra oxygen being delivered to the cylinders. Your boost gauge is probably reading higher at a lower rpm also. The higher the boost the less your mpg.

 

Turbo or not about any car I have ever owned has lost 1-2 MPG in the cold. My SS is no different.

Cars just run richer longer in the cold. The older cars were worse if they had bad choke pull offs.

 

See what GM caused by putting in that DIC!!! Who REALLY watched their tire pressures that close before? And milage? I'd keep tabs on milage to determine when/if I needed to do some tune up work or add inj cleaner, now its borderline obsessive. What have we all turner into? Next thing you know we will become lobbiests! (yes,its a pun)

 

YOU failed to understand that nitrogen is an INERT gas, which holds practically no moisture. Moisture is what creates the biggest change in pressure with temp changes, and why race team use N2. Not because it is N2, but because it is the easiest gas to keep the moisture out.
Is it worth it for passenger cars, NOPE.

 

Sorry... YOU FAIL!!

Nitrogen is NOT one of the inert gases.

Water vapor (moisture) certainly can be present in nitrogen.

Water vapor acts just like the other gases and follows the gas laws.

Under the high temps encountered in racing, water vapor "can" become steam, which expands considerably in that state.

As for passenger cars, we agree.

 

i'm not as dumb as i look, and i've learned not to argue with those who "just don't get it" . also my moma told me not to pic on the retarded people.

 

just because people should know that they are only buying a partially filled tire , unless they put a vacume pump on it , and i think that would cause the tire to dismount. if you take the valve core out. and then lets pretend that we have a tiny little mr goodwrench man that acually lives and breathes . if we could put him in the tire, with the valve core out . i suppose he wouldn't be able to breathe in there?

 

Sorry Joe but LT is correct.

Then the MFG who puts the Nitogen in the cylinder makes it pure and seperates the moisture in the gas before compressing it.

The gas in the cylinder is nearly if not 100% dry.

That is just why race teams use it as do many in industry.

Either way the rate of expansion of Nitrogen vs Just plain air is nill.

Moistue can be peresent in Nitrogen but seldom is in a industrial cylinder unless it is required.

You could do the same with Oxygen too but the problems comes in it is not inert and could accelerate a fire if it came into contact.

We used to have to humidify Oxygen for our medical people because it was so dry it would hurt their air passages and nose by drying them out.

It is not correct to term it as inert but it is correct to call it mostly inert depending on how it is prepared.

Here are some uses for Nitrogen

Nitrogen gas is acquired for industrial purposes by the fractional distillation of liquid air, or by mechanical means using gaseous air (i.e. pressurised reverse osmosis membrane or pressure swing adsorption). Commercial nitrogen is often a byproduct of air-processing for industrial concentration of oxygen for steelmaking and other purposes. When supplied compressed in cylinders it is often referred to as OFN (oxygen-free nitrogen).

Nitrogen gas has a wide variety of applications, including serving as an inert replacement for air where oxidation is undesirable;

To preserve the freshness of packaged or bulk foods (by delaying rancidity and other forms of oxidative damage)
In ordinary incandescent light bulbs as an inexpensive alternative to argon
On top of liquid explosives for safety measures
The production of electronic parts such as transistors, diodes, and integrated circuits
Dried and pressurized, as a dielectric gas for high voltage equipment
The manufacturing of stainless steel
Use in military aircraft fuel systems to reduce fire hazard, see inerting system
Filling automotive and aircraft tires[8] due to its inertness and lack of moisture or oxidative qualities, as opposed to air, though this is not necessary for consumer automobiles.[9][10]
Nitrogen molecules are less likely to escape from the inside of a tire compared with the traditional air mixture used. Air consists mostly of nitrogen and oxygen. Nitrogen molecules have a larger effective diameter than oxygen molecules and therefore diffuse through porous substances more slowly.[11]

Molecular nitrogen, a diatomic gas, is apt to dimerize into a linear four nitrogen long polymer. This is an important phenomenon for understanding high-voltage nitrogen dielectric switches because the process of polymerization can continue to lengthen the molecule to still longer lengths in the presence of an intense electric field. A nitrogen polymer fog is thereby created. The second virial coefficient of nitrogen also shows this effect as the compressibility of nitrogen gas is changed by the dimerization process at moderate and low temperatures.[citation needed]

Nitrogen tanks are also replacing carbon dioxide as the main power source for paintball guns. The downside is that nitrogen must be kept at higher pressure than CO2, making N2 tanks heavier and more expensive.

Note the line for used in Aircraft and Automobile tires.
Dealers are just to the point to where they can't sell cars and need to find something new to sell.

Your better but not much better off buying a lottery ticket. The odd of it doing you getting a worth while return is better and that is not saying much. THis can be arfgues but the end result is it is not a must have for a street car tire unless you have some tire pressure sensor that can be harmed by moisture. There are non that I know that would be.

I think they use it so tire pressure will all read much the same on the new cars and people don't go anal on them about each tire being different.

Note how obsessed people get with their boost gauge or water temp. IF thewy are unsure or untrusting the get paranoid. Before when all you have is a light most people could care less. I am almost glad we don't have an oil pressure gauge.