tire pressure has always gone up about 5 lbs. on hot roads.
hasn't damaged a tire yet.
for an $18.00 savings.
I don't mind checking my tires once a month or so.
(needs to be done anyway)
sounds to me like an over priced poser product :-)
Pressure change of about 1 PSI can be expected with a 10° temperature
change using normal compressed air. Mostly because of the moisture in
the compressed air. I've never seen more than a 3° change in a day of
travel on roads of any temperature. Might be because I use my own
compressed air with a drier on it for painting. For just the fact that
you don't have moisture in a tire inflated with nitrogen to check
corrosion of the aluminum rims makes it a plus. I would also like the
consistency of them filled with nitrogen but it's way to inconvenient
to go get it done, maybe some day.
Never head of the sidewalls leaking and seldom have air loss when my
cars sit for an extended period of time, just on the '64 knockoff
rims. That has stopped since I junked the 10 year old tires and
cleaned up the corrosion on the rim beads.
agree thats what you said
what I said was:
gaining an extra 5 lbs. on hot roads
hasn't damaged a tire yet.
least not on my car....
I also havent kept tires long enough for "corrosion" to be a
I don't have a $60K car but if I did?
I would still think nirtogen is "an over priced poser
thats just my2¢
On or about Wed, 04 Jun 2008 12:49:57 GMT, "Bob Drake"
For $18 I've got some magnets you could put on your gas line and get
200mpg. Or you could make a down payment on a hydrogen generator that
will turn 1/2 a cup of water into an extra 25mpg per tank. Nitrogen is
just another version of these same scams.
Water is the culprit, not the other 22% oxygen and misc. gasses. Water
expands 1100 times going from liquid to vapor. If you just compress
normal air in the summer you are going to get some liquid droplets.
Put those into a tire and as the tire warms some of that liquid turns
to vapor and the pressure rises. But nitrogen expands exactly the same
as dry air. Neither nitrogen nor dry air leaks any significant amount
through a well maintained tire. By the time you have a leak it doesn't
really matter what the gas leaking is, the hole is large enough for
anything to leak.
I fill my tires in the winter when the air is dry. When summer comes I
let a little out to maintain the recommended cold pressure. If I ever
do need to add air to a tire I make sure I blow some air through the
hose first to remove the easy to remove moisture. My pressure varies a
couple of pounds from cold to warm the same way yours does but I have
$18 dollars in my pocket who's extra weight slows me down so all other
things being equal, you probably have the faster car.
I don't think clearing the line is good enough. I have a filter on my air
compressor, but that too isn't good enough. I still get 5-6 lbs increased
pressure on my Michelin ZPs - Goodyears were less - not bad enough to do
anything about. An air dryer on my compressor would probably work as well
as nitrogen I suppose.
wrote or did cause to be written:
Don't worry about it Bob, some will think everything is a scam, in
this case it does what it is supposed to. Keeps the tires at a more
uniform running condition with less fuel usage than if they were
running at a low pressure. Not a lot of savings but it is a savings
and with a few more tweaks it can be noticeable. Take a look at how
they have made the cars as slippery as they can, aerodynamic outside
mirrors, flush mounted windshields, door handles are now flush with
the exterior, lower profiles, radial tires for less roll resistance,
and even the lowly wiper arm is out of the wind stream.
If you get anything that is noticeable with the change please let us
Feedback on Nitrogen in C5 Michelin Runflats.
I just finished a 1,000 mile trip to New England and back. It was 95
degrees on the highway coming back. The tires are 32 psig cold and went up
to 36 psig at 70 mph. Only one lb difference with nitrogen over air.
Mileage was the same at 70 mph cruising - 6 speed convertible.: 33.1 by the
DIC and 32.1 by odometer miles divided by gallons in tank.
I think I will replenish the tires, if they go low, with air in the future.
Dry nitrogen is for braked airplane tires that
see wide temperature variations and it's good
stuff to pre-charge hydraulic accumulators (to
We can bottom out an accumulator before we
charge it with dry nitrogen.
How does the average tire dealer evacuate *all*
the air and moisture from the tire casing before
charging it with Nitrogen?
On the surface it sounds like "feel-good" snake oil.
I remember 16.9 in St. Louis around 1964 and about two years later in
Florida. Lowest I remember. Can very vividly remember the first time I put
$5.00 worth of gas in a car. And it was a Pontiac with a 20+ gallon tank.
Hung around a gas station in St. Louis at Fyler and Kingshighway named Culp
Oil. If you filled up, they gave you a case of Pepsi free. Gas was around 17
or 18 cents a gallon. And the Pepsi was in bottles in a wood case. Guess
that just makes me old.
Speaking of prices, anyone remember when you could buy two White Castle
hamburgers for 15 cents?
Tks for the memory jog -- I'd forgotten the
"free" soda pop. Signal Oil stations in SoCal
did the same. IIRC it was Royal Crown Cola and
NeHi Orange. Traded in the empties -- wooden
case was stenciled with the station's name.
Kept the customer coming back!
Not much margin to work with. Station operators
usually got 3 cents for pumping (plus a small
quarterly bonus when they topped their target.)
SoCal gas price was same as yours. min. wage
was 95 cents and I was making the "big-bucks" at
$1.15 per hour (hour's work = 6 gal of gas.)
But, it took over a week's work to make a car
payment. No White Castle sliders out here but
we had the first Mikey-D at 12 cents a burger
(bun, patty, three pickle slices and a squirt of
ketchup and mustard--maybe some grated onion).
Lowest gas price I every paid: 4.8 cents a
gallon, Midland, Texas Dec. 1961. Real
'vertical integration' -- oil wells, refinery &
gas station all within a one-mile circle.
Was out in the boondocks last week.
Non-electronic pump in a small gas station was
physically limited to 2.99 per gallon. They had
it set for $2.179 per gallon and had a large
sign on the pump that said, "the price you pay
will be double that shown on the pump."
I guess that when gas rises to six bucks they'll
have to change their sign to "...three times..."
Works for me!
No, but we used to get a drink and a bag of 10 White Castle for a
dollar in Toledo in 1959. By the time you slid the last one down it
was time to change the oil in the bag. Then came McDonalds and the
rest is diarrhea..........
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