Fill tyres with nitrogen and gain 5% MPG ?

Inactive

Try helium in your tyres, it works well in balloons..:D

anewman

Alfrescodave wrote: »

At the risk of extending this post longer than is sensible - how is the air removed from the tyre before it is filled with nitrogen ? Surely they don't suck it out with a vacuum pump.

Nitrogen molecules larger than oxygen, less likely to escape !!! I'm still to be convinced that this isn't a joke

I believe certain gasses can actually pass through the rubber in the tyre over time. Obviously this happens so slowly it is not visible, but in this process in itself, the nitrogen content in the tyre is likely to increase slightly to above standard atmosphere.

Alfrescodave

This has to be a marketing gimmik. Anyone know Jeremy Clarkson's number ? -definitely one for the Top Gear team

no_more_cards_for_me

Inactive wrote: »

Try helium in your tyres, it works well in balloons..:D

Have you seen the price of helium lately ?

It's going up as its a finite resource. I don't know the volume in the average tyre but 1,324 litres of helium would costs about £70. (Its the cost of an average fill on a scuba rig for helium diving beyond 50m)

skiddlydiddly

I think its just that nitrogen doesn't leak out as easily so it is more likely your tyres will stay at the correct pressure.This isn't actually gaining you any mpg, its just not losing you any.As long as you keep your pressures correct with good old air there's no enefit I can see.

Also, as stated above, do they suck out all the old air 1st ?

Eric_Pisch

F1 cars use it and its recommended for the nissan GTR

They use it because when the tyre gets hot its characteristics change less with 100% nitrogen than with normal air, critical when tyre wall movement is calculated as part of the rebound rate of the spring damping when your stomping round a track and your a professional race driver

on a road car obeying the speed limit, gimmick

jet fighters on carriers purge there tanks with it to reduce explosion risk as well

ariba10

There are people who think that eating a certain brand of Cornflakes will make them thinner.

davetrousers

From the AA

For passenger car applications the main claims seem to be

• Reduced corrosion – because unlike air there's no moisture in pure nitrogen
• Slower rate of pressure loss – because nitrogen molecules are larger than oxygen molecules (which make up 21% of compressed air)

So in short you might as well just keep your tyres at the right pressure (ie check them regularly - as you are advised to do).

Eric_Pisch

davetrousers wrote: »

Normal Air, being 78% Nitrogen

exactly when a sec or 1/10ths of a second per lap count it makes a difference

when your driving at 30mph in a ford focus it makes !!!! all difference

Eric_Pisch

davetrousers wrote: »

From the AA

well in 20 odd years and 500,000k miles driven i have never seen any corrosion in a wheel

so its for lazy people who cant be bothered to check there tyre pressure