What is the difference between PA and NY's gasoline additives?
In my '98 Escort SW,
Gas bought in PA -> 35.0mpg, $3.029/gal
Gas bought in NY -> 28.5mpg, $3.259/gal
In PA, $0.0865/mile
In NY, $0.1144/mile
Is PA still using MTBE? (NY has ethanol).
Using NY gas, I have not broken the 30mpg mark on this vehicle since
last winter. When I go west for something, I consistently get >30mpg on
"foreign" gas, and it's cheaper too.
It's not the travel direction. These mileages are not observed on the
highway going to and from PA; they are seen in random commute travel
(my normal commute). It's a quantitative difference in the fuel blend.
I can't believe I'm being suckered in to this... but you're kidding,
I always get better MPG going east than west, for no other reason than
And this is in a ground-based Taurus, 4 wheels, the typical unit.
No, think about it. The airplane is designed with a maximum _airspeed_
at a given altitude. When it's in a headwind,
a) the ambient pressure is lower (Bernoulli...), as if the plane was in
still air at a higher altitude.
b) the airspeed to groundspeed relationship is different. If you're
traveling at 100mph (ASI and yes I know it should be in knots), in a
30mph headwind, your ground speed is only 70mph.
Oh, that part is right for sure - I'm talking about the effect of wind
on automotive fuel economy. The car has to overcome a headwind with
more power & fuel consumption.
Hunt said "An air speed the will hardly slow a car on the ground, can
stop all ground speed for a small aircraft."
Wind sure did slow down my Aerostar, esp. with a Christmas tree on the
roof. Cruise kept kicking out w/ the loss of speed. My father-in-law
won't drive his Dodge pickup on the interstate with cruise on in a stiff
headwind because of all the crazy shifting down & up it does.
Are you sure your father-in-law is not encountering hills or mountains? I
thought you said you drove a Taurus? Why would you have a Christmas tree on
your Aerostar, going in both directions anyway?
Not talking about slowing the vehicle at all. We're talking about the
additional power (and therefore, additional fuel) required to overcome
the added air resistance that a vehicle encounters when traveling into
the wind. I had a weekly commute between KC & StL for about three years
and kept very close fuel & maintenance records. My one-way runs to StL
averaged 31.9 mpg over the three years, and StL to KC was 28.1 mpg for
the same three years. This was all I-70 traffic, with cruise set at 70
mph, and it didn't matter where I got fuel. What DID matter was the
effective air speed of the vehicle - yes, it was still on the ground,
but it still had an air speed, or if you prefer, a definitive forward
speed as would be measured by a pitot tube device. Traveling at 70 mph
on the ground with a 15 mph average wind from the West toward the East,
the "air speed" of the vehicle was (70-15) 55 mph, but traveling the
other way, same wind speed and direction, the "air speed" of the vehicle
was (70+15) 85 mph. There are of course other factors such as rolling
resistance of the tires, but I always kept them on the high side of the
psi recommendations, so that wouldn't amount to anything that was a
OK, you can go back to talking about your airplanes again. :)
What about the fact you Taurus has a lager frontal area than the rear area?
Beside with all of the curves in a road you are not always going directly
east or west. What about hills they are never always the same going east
and west ;)
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