kawiguy827

Hey all, how's it goin? I've had my GT for a week and a half now, and i love it. It's a phenomenal car. However, that said, I've got just under 600 miles on it, and the thing has been GUZZLING gas. I mean, it rivals me for beer guzzling in college. Also, i noticed that at around 70mph, in 6th gear cruising on the highway, i'm getting mid to upper 30's for fuel economy.

Can anyone validate these numbers? Has anyone had any long trips with theirs yet that can shed some light on the subject?

Thanks guys!

-J

topangler25

with a tail wind I averaged 26 mpg at 70 on a 180 mile trip. on the way back into the wind I was at 23 mpg. for regular city driving, which is mostly stop and go for 12 miles with a short bit at 40 mph I get about 14. this is while using normal driving mode with 93 octane fuel. I have only used 87 octane once just to see what the difference was and it really did not matter for the fuel economy but you could tell the power was less when you got into the throttle.

05roadsterguy

No doubt that this Coyote likes to drink! I have 2500 on Ranger now, and most of that is local stop and go. On my way to school @ rush hour I take the back way. about 70 min of averaging 22mph I get 19 -20ish. On the way home I take the freeway, and get 24. I average with no long drives about 21.

The 2 longer cruises I have taken were rather spirited, and I got 16.6 and 15.9 on those runs

AK_Kayaker

OP, yours is way too young to be looking at mileage yet, and hand calculated is the only way to go, averaged over several tanks.
As quoted from the 2015 owners manual.

"Calculating Fuel Economy
Do not measure fuel economy during the
first 1000 mi (1,600 km) of driving (this is
your engine’s break-in period). A more
accurate measurement is obtained after
2000 mi (3,000 km) to 3000 mi
(5,000 km). Also, fuel expense, frequency
of fill ups or fuel gauge readings are not
accurate ways to measure fuel economy.
1. Fill the fuel tank completely and record
the initial odometer reading.
2. Each time you fill the fuel tank, record
the amount of fuel added.
3. After at least three fill ups, fill the fuel
tank and record the current odometer
reading.
4. Subtract your initial odometer reading
from the current odometer reading.
5. Calculate fuel economy by dividing
miles traveled by gallons used (For
Metric: Multiply liters used by 100, then
divide by kilometers traveled)."

COMPORNG_15

has anyone used the 93 with ethanol in it? I am in New Orleans and there are few and far between gas stations with ethanol free gas.

whatsup62

Gas Mileage? Really??? If that is truly a concern you should not have bought a GT. Like any other pony/muscle car....met to breathe and run. Best I've done on a 200 mile drive is 20. Mostly around the 14-15. Passes everything on the road but a gas station...I'm OK with that.

topangler25

I use 93 with 10% ethanol (at least it is labeled as 10%) all the time and have no issue. The engines today are made for it and so is the fuel tank and fuel system. Plus unless it is a garage queen you will never have the same fuel sitting in that car for long anyway so the water should not get a chance to fully separate from the fuel.

JohnnyB15GT

Same here. Mustang is obviously still new, but I've used (no choice here) 10% ethanol gasoline in everything, include 98 Mustang GT and 07 Vette with no issues.

COMPORNG_15

sweet guys good to know, Thanks for the feedback!

05roadsterguy

*Just to touch base on this again, I have been switching between 87 and 89
on alternate tanks. I get about 20-21 as reported by the car. I do stick my
foot in it occasionally and am not a moderate driver. Though I
am courteous and patient.*