TRMach1

I recently bought a new 5.0 6spd last week and on the way home which was a 200 mile trip i got 28mpg at 70 mph.

sharony1994

i get 10.5 mpg average on the street. on a good day ive seen 11.5. On the highway i once got 33.5 witch was amazing then i put my foot down and it got about 23. 13-14 on the street is amazing and i think 23 on the highway (70 mph cruising 6th) is about average.

CaptainRon

You bought a Mustang that was spec'd out for basically, autocrossing..... and your complaining about not getting decent gas mileage? Should have done some better homework while car shopping before ya popped on this one.... Very cool car! 3:73's are the way to go, on the street that is......

Norm Peterson

With 3.73's, not autocross. You'd need 3rd way too often at any lot bigger than a postage stamp. Think track days on a technical track using 3rd/4th/5th and hardly ever 2nd.


Norm

Chromeshadow

I have the 3.7 manual with 3:31s, and 255/45/18s with pretty heavy 5 spoke chrome wheel that weigh 50 lbs each. My combined average mpg is 28, I get up to 33 on the freeway. We're at 800 ft elevation to 2,000 ft most of the time, no mountains in WI. I usually red line it a few times every time I go out, especially getting on the freeway. I believe it is not the fast acceleration that gets poor mileage, it the quick stops. Acceleration turns gas into motion, stopping turns motion into heat.
The 3.7 will totally turn the gas off to the engine when coasting in gear...not sure how well that works with the auto. I run 89 octane, I seem to get better mileage for city driving with 89 that 87, doesn't make any difference on the highway. btw, I do not have the factory lip(spoiler).

72MachOne99GT

2013 GT500

Drive for mileage: 17/24
Thrash: 7/14
Average over its 3400 miles: 14.9

I've seen 24.x on the highway as well. Everyone ought to already be aware that habits are a huge majority of the results.

Norm Peterson

Wheel weight isn't nearly as big a factor as people want to think. Unless you're being timed to the nearest 0.001 second, it really doesn't matter for either acceleration or mpg. For braking it does not matter at all unless you can't get the car into the ABS (or lock the brakes if ABS is not available or inop for any reason).

Nope. Acceleration uses more of the available HP, more of the available rpms, and runs richer while this is all happening.

Ignoring fuel cut on deceleration, hard stops only save the amount of fuel that it would have taken to cruise however much extra distance you drove at speed before hitting the brakes, minus the fuel used on closed throttle at slightly above idle rpm for the same period of time.


As far as I'm concerned, it's worth the tiny fuel use penalty to brake harder than necessary at least occasionally when it is safe to do so. Staying "current" with what hard braking feels like takes a lot of the drama out of the hard stops that you must make. Who would you rather have behind you - the driver for whom a hard stop is nothing special or the one who first stomps on the brake pedal and then panics at the feel of ABS activation?


Norm

Derf00

just read my sig.... It's a V-8. If you're worried about Mpg buy an ecoboost 4 or 6 banger.

Better yet, ride a bike and never worry about MPG again.

GTjoe49

I reciently drove from Boston to Orlando and back in my '10 with 3.73's. Enjoying the drive (wink, wink), I averaged 19.65 calculated mpg.

Best bang for the buck on the planet!

Lil_Chef

I guess I drive my car wrong. I get 24.x MPG on highway trips and 16-17 MPG in town.