Can you get 30+ MPG going 70-75mph?

[Kwisak]

Very possible my current average MPG is 32

[humfrz]

Originally Posted by carbonBLUE

i was in the USA Its a straight road the follows the freeway in texas (like 6 hours of nothing till you hit el paso).........

.

Ahhhh......yes, so it was in Texas, USA ......

[Nevermore]

I like to improve gas milage whenever I have the chance, just to see how well this little car can do it. I usually set the cruise control at about 72 on the interstate and even if the computer starts at around 27mpg (averaged over 150 previous miles) I can increase it to over 30 (averaged over 300 total miles). The actual math turns out to be about 29.3 or so. Now imagine filling up before such a trip. A while back I did a two hour + drive with cruise set to right around 70 and the computer said 36, I calculated 34 at fill up.

[tennisfreak]

Nope I can get close @28 but not really any higher.

Then again I cant say I truly get a full tank of highway driving either so there is usually around 50/50 mix of city/highway driving.

[chrisl]

Originally Posted by strat61caster

Uh X^2 is exponential as well as quadratic.

A square is a rectangle but not all rectangles are squares.

Technically, no, it isn't. Exponential means that it is of the form k^x, where k is some constant. Quadratic is a special case of polynomial, which is of the form k0 + k1*x + k2*x^2+k3*x^3+...+kn*x^n (where k0, k1, k2... are constants). Exponentials grow much faster than polynomials (in the limit as x --> inf), which is why I said quadratic drag is quite a bit better than if it were to increase exponentially.

http://www.knewance.com/comparisons/...ic-growth.html
http://www.math.ucla.edu/~bnelson6/E...ial_Growth.pdf

(and as I said before, I know I'm being pedantic, but I can't help it on technical topics, since I'm an engineer...)

[m.wood0213]

absolutely, but im in A/T.

[00NissanNinja]

I got ~33 mpg on my trip from CO to OH going for the majority of the trip 75mph.

[strat61caster]

Originally Posted by chrisl

Technically, no, it isn't.

Ah, I blew those lectures off when getting my degree. You seem to be correct.

Just because you sat in classes for four years doesn't mean you have to correct everyone, you never know how educated your opposition is.

[chrisl]

Originally Posted by strat61caster

Ah, I blew those lectures off when getting my degree. You seem to be correct.

Just because you sat in classes for four years doesn't mean you have to correct everyone, you never know how educated your opposition is.

No offense intended, just trying to use terminology correctly. Cheers!

[carbonBLUE]

Originally Posted by 00NissanNinja

I got ~33 mpg on my trip from CO to OH going for the majority of the trip 75mph.

that isn't bad considering the elevation changes

MT or AT?

[Luis_GT]

30mpg while driving a constant 75mph... id be surprised if you couldn't get 33mpg...

my last tank I got 27mpg according to fuelly and it included 70 miles of city driving, and 5 1/4 mile passes. And I drive at around 80ish on the freeway

[HunterGreene]

Originally Posted by carbonBLUE

that isn't bad considering the elevation changes

MT or AT?

Yeah, overall downhill.

[FundUm]

Yes I live off I-30 about 65 miles from office right off I-30 as well. I always go 10% over limit cant go on record if 10% or > over limit in TX going 80 usually on cruise get about 32.1 manual calculation the computer says just a few over usually like 32.4

[reeves]

You can hit 34+ MPG fairly easily if you travel constantly in the 50-60 mph zone for an extended time. Not that anyone would wanna do that in this car.. But I went through over an hour on some rural roads (35, 45, & 55 mph speed zones) coming back from outta town to a friend's house, and even with some stop lights/signs, I averaged mid 30's every time I make that trip.