Freshman4life05

I recently made a long trip from North Carolina to Michigan to visit some friends. On they way there my 2005 GT got 23.5 mpg and on the way back it got 24.5 mpg.... I thought that was awesome and was wondering what's the best you guys have had.

BTW its a 5 speed and mods I have are AFE cold air intake and Pypes axel back muffler delete system. No tunes

Nuke

This has been beaten to death. There are so many variables. I could drive your car and get much better or much worse mileage on that same trip.

I can average 27 MPG pump-to-pump, hand calculated if I stay at a steady 55-60 MPH. At steady 70 MPH I get 23-24 MPG. But again, that can change drastically due to the ethanol content of the fuel in addition to a dozen or more other variables.

baddog671

My tanks usually end up being 21-23mpg.

Best tank was 29.4mpg, 425.5 miles! Cruisin down I95 loaded with luggage and my fat ex

SpartaPerformance

31.7 cruise control set to 70 coming home to NY from Carlisle. 07 GT with CAI, tune, ARH long tubes, Steeda CMRC deletes but 3.31 gears.

rangerfx405

mines around 26 mpg

johngt10

Last long trip I made with my mods in the Sig I made 27 mpg running around 65-75mph

Freshman4life05

I ran 70-80 most of my trip, just amazed that it did that well ... Surprised at all the high mpg responses, thought mine was good but 31 mpg is amazing

Nuke

I drove the Stang 800 + miles roundtrip every 2 weekends for almost 1 1/2 years; same stretch of road and same gas stations; so I have a lot of data. The variances surprised me despite driving the same manner.

Fuel mileage is an average and like everything, the more data the more accurate that value becomes. I scoff when people think they know their average fuel mileage in anything under a few dozen fill-ups from at least 1/2 empty.

Freshman4life05

Nuke

Couldn't imagine driving 800 miles every other weekend, my trip was roughly 1500 round trip ... I have had mine for about 1.5 years and this was by far the best mpg I've got so far ... I thought mine would be like fluke didn't expect so many responses higher than mine

Nuke

The 4.6L is a gas miser for a V8 providing you're not accelerating hard, stopping for as few traffic lights/stop signs as possible and keeping her cruising at or below 1800 RPM. Fuel consumption goes up significantly and non-linear above 1800 RPM.