Hello to all. Just purchased a set of Michelin Pilot Exalto All-Season
205/65 H15 for 98 Camry XLE V6. Next day I went to Toyo dealer for wheel
alignment and filling of tires with nitrogen. As for the wisdom of spending
extra money on nitrogen, time will tell. I like to ask for recommendation on
inflation pressure. Should I stick with Toyota factory recommendation, or go
up few notches. Telling by rougher ride, the shop set the pressure a bit
higher, as they usually do. I am not too concerned to maximize thread life
or extract best mileage from the car, I just like good traction for
left-lane spirited driving at interstate speeds. I almost went with V rated
rubber but was afraid those may be too noisy for long trips. Thanks in
I would go 2-4 PSI higher that specified by the Camry User manual. Most
auto-service places (including some dealers) set the pressure way too high.
I use about 33 PSI when the tires are already warm (which is about 30-31
cold tire pressure) for my 98 XLE V6 using Michelin Pilot 92H tires. The
above cold tire pressure numbers assume that the ambient temp is about 70
You should use the same pressure for nitrogen as compressed air. If you
bought the tires at Costco, they'll pump them up with nitrogen for free
as they've gone nitrogen in just about all their facilities, if not all
S. Petkovic wrote:
But that's not really the best idea either.
Me? I like to have some other gasses too; I prefer this mixture in my
Nitrogen N2 78.084 %
Oxygen O2 20.9476 %
Argon Ar 0.934 %
Carbon Dioxide CO2 0.0314 %
Neon Ne 0.001818 %
Helium He 0.000524 %
Methane CH4 0.0002 %
Krypton Kr 0.000114 %
Hydrogen H2 0.00005 %
Xenon Xe 0.0000087 %
That's the brew *I* use!
Pooder approved this post . . . .
what do you do when you need the tires lose pressure? can you mix air and
nitro? if so what are the benefits of having nitro? eventually all tires
need added pressure so do you go to someone who uses nitro or can you get a
tank ful and keep it in your garage?
I will ask shop to check/add nitro when I have my oil/filter change.
Otherwise, adding coulple of lbs/sq"
regular compressed air would be rather small procentage of total volume so
it would not change
things too much. It would be nice if they started marketing compressed nitro
in cans like those of tire
repair/inflator so one can keep it ready in trunk.
it seems like a hassle more than a bonus to me, but here's another silly
question. say you get a flat tire and need to use the spare that is factory
filled w/ air, does it affect the handling or ride of the car?
And yet another silly question- Do they evacuate all the air out of the
tire after mounting it, then add nitrogen?? I'm not even sure it would even
be possible without unseating the bead. I guess you could put the whole
wheel and tire assembly into a vacuum chamber....
As I understand, they fill nitro once without tire valve core present.
Then, release all air/nitro out, screw in the core, fill nitro second time
and that's it. The result is not 100% nitro, but close to it.
Think about this a little bit. Air is about 70% nitrogen. If nitrogen leaks
less than oxygen (20% of air), the tire will concentrate nitrogen as it
leaks down. Top it up a few times and you'll naturally end up with a very high
Let's see now, if you just pump "air" into your tires, your pumping in
78 percent nitrogen and 20 percent oxygen. So approximately 8/10ths of
the "air" you pump in for free is nitrogen. How much are they charging
for nitrogen alone?
Well, my guess is that at highway speed, spare tire filled with regular air
would increase in pressure a bit more than tire
with nitrogen.. I doubt that a 'regular driver' like you and I would notice
any difference in
handling or performance. But then what do you think about spares that are
not even full size? What kind
of difference in handling would that combo produce, probably more than
difference in pressure alone.
There is a good reason why auto manufacturers recommend use in emergency
only and at
maximum 50mph when using 'tiny' spare tires. Even full size spare tire of
different make (michelin vs pirelli)
or type (touring vs high performance all season) would behave differently
than other 3 tires regsadless
if there were filled with air or nitro. Yes, filling with nitro is a bit
extra hassle, but I am willing to
spend a little more money and effort for a small increments in safety.
Example, we can all handle a tire blowout
at 50-60mph on straight, dry road. How about a tire blowout at triple digit
mph speeds. I don't feel too confortable
in that scenario. That is why I never buy tires just because they're on
sale, always pick higher perf. If brakes unexpectedly fail, I still have
good steering and good tires. In worst case, I'll steer myself off the road
and maybe have chance to pick which tree I will hit (always pick smaller
tree - trust me on this).
I am not preaching using nitro or anything else. I posted my question about
tire pressure to get second opinion.
My, now advanced age, makes me think that I am definitevly not the smartest
one on the road. I used to
pressurize exactly by book, now I will add a bit more on top on
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