Hi All,
When I was driving my 07 GT/CS home from the dealer a couple weeks ago, taking the 2 lane back roads to avoid some pot-hole patching, I noticed that around 50 to 55 MPH in 5th gear, I was showing about 30 MPG. That is what I would consider great gas mileage for a 4.6 L engine with the 5 speed manual.
What are the rest of you getting for gas mileage when driving easy with the V8's and V6's on the highway?
Thanks in advance for your replies!
Phil

 

When we did our 5,600 miles trip to San Diego, ET highway, Route 66 last April we were right around 25 mpg in our '07 (5 speed). Mostly highway driving of course. We never got close to anything near 30.

 

I am getting 22+ mixed city/highway. Highway at 75 mph on mostly flat roads, I get 25+. Stock 2014 5.0.

 

With the tune I just got, 28 mpg when all interstate, and more interestingly over the last three tanks of gas with mostly city driving I've netted 23 mpg. (5 speed manual GT)

One must note that right after the tune I was getting 11-12 mpg. I think the accelerator got stuck a few times :-)

 

Thanks guys. When the computer registered 30 MPG, it was for a flat stretch of road where I had reset the the computer after getting up to speed. Then I drove for about 10 miles and it showed right at 30 MPG at 55 MPH. I wonder if I have a generous mileage computer???

Phil

 

2005 V6. I average about 20 mpg. Mostly highway. Mostly not at speeds that the EPA tested at though.

 

Most mpg info you will see is done over several tanks. That 30 was a real short blast of hope for a high mpg.

 

I can make the lie o meter read whatever I want up to the 99mpg it maxes out at. The more you reset it the worse the calculations will be. MY '08 Bullitt always sat around mid 23's and hand calc came out about 22.5. Haven't put enough miles on the '10 yet to know but it seems to be doing slightly worse but it also has a ton of mods that the Bullitt didn't have.

 

I'm getting 19.9 mpg in my Bullitt. I'd say I do 70% highway driving.

 

Really I like to aim for the lowest mpg I can get. I own my Mustang and Lightning for fun.....lower mpg means I am having a blast driving.

 

I get 27 (calculated) on long freeway trips, 23.5 for my all around driving (75% highway speeds). Redline at least once per day. 4.6L3V, 87 w/10% ethanol, 4200' altitude.

 

I've been averaging around 20, most city-ish driving. Between learning how to drive a stick, and enjoying the extra power on tap (came from a Focus) I think I'm doing OK.

 

LOL!!!!!

As long as your having fun Pete, that's the main thing

Phil

 

We all do. Most car companies do that on purpose. It's been exposed many times. I remember our computer stating 27+ MPG on that trip I talked about. Wrong!
We did a 6,000+ miles trip in a BMW roadster a few summers back. We were blown away when the computer said we exceeded 30 mpg. It was really 26 mpg when all was officially tallied.

 

I have found that if I zero everything after a fill-up (not during), the highway mileage throughout that tank is within about 2 mpg's of the actual calculation. The display is 2 mpg higher than actual.

 

Averaging about 20.5 mpg over multiple tankfuls. Mix of driving, with some inevitable stop-and-go highways backups as part of my work week.

When summer hits and the A/C goes on, this will drop to about 18.5 mpg.

But I didn't get this car because it made good economic sense.

 

My F-150 and my wife's Edge are pretty close, within 2 MPG. The Edge has actually been within 1 MPG and that is pretty good.

I hope to put some miles on it soon and will get a better idea how "forgiving" the mileage computer actually is, if I can drive it easy

Phil

 

I am lucky to break into the 20's... but then again that intake "thingy" under the hood makes it tough to stay out of the gas

 

Both mine get the best mileage of any cars I own and are the most fun/quickest. Not sure what you'd have to do to get under 20mpg I flog on the car every time I drive it, not constantly but I always run it through the gears quickly and get up to the speed limit just about as fast as I can in most cases. Both had/have the 3.73's.

 

Don't have an Edge, but do have a '07 FX4 F-150 and it's really close as well. We were extatic about the mileage of our '08 GT 5 spd with 3.32 gearing. I know the Mustang's in car MPG readout is a little off, in our case it's usually with in 1 or 1.5 mpg of mileage figured by hand. I reset it all every gas stop and do the math in my head usually.

My ScanGageII is likewise very close, but it will reset itself in just a few moments of parked. I use it for a "toy" usually and use the MPG readout like a vacuum gage sometimes, seeing how high I can keep it. Way I know it's pretty close then is those cases where I used it and we ran from gas stop to gas stop with no stopping for food, etc. I gas most frequently at the same BP station at Greenville, usually same pump same position on the way home. When we were going for longer drives and I have it in mind to test, I top off on the way out.

The day we bought it in Roanoke we stopped and I gassed both cars at Daleville, I reset everything, and wife drove the Mustang home up Rt 11. We took it to a gas station up off the exit before going home, car's readout showed 28.6 and math vs miles had it at over 28 as I recall. I live near an hour from several cities (Lynchburg, Roanoke, Harrisonburg, Lewisburg) , my home is a small community with one exit off the interstate, we use Rt 11 mostly running 55 mph. I usually use 1, 2, 3 and often go into 5th then. Since then, on some long drives we've seen 30 - 31 MPG and one day we took a long drive up through the valley (no interstate use) and that day the math was within a couple tenths of the readout, both over 32.

I have also noticed that at 70+ on the interstate like if we go to Lewisburg, mileage does drop noticeably, more like 26- 27 or so. I also have seen where in town or city driving, start and stop, gear changes, accelerate to stop, like where maybe we do a lot of running in Roanoke shopping, etc .... it will drop off fast.

I have a '95 T-Bird 4.6 with 3.08s that will knock out 30-31 mpg like that day we rode to Norfolk and come back home that night through Wakefield, wish my '92 5.0 Sport would do that. I think this Mustang will match my wife's '03 Forester 5 speed in steady state driving, but short periods of stop and go don't knock the Forester back as bad.

Our '01 Merc GM with 2.76s averaged 26-27 mpg (math) over 21 days and 7,955 miles on our biggest road trip toting "Wife Unit", our puppy, myself, and all our luggage stuff in that huge trunk. We did I-64 to St Louis to start on old Rt 66 west and then up through Sequoia and Yosemite and back across Rt 50 and down through Utah and Monument Valley, then up through Utah to Yellowstone and down through Wyoming to Rocky Mtn Natl Park and working our way home RT 50 back to St Louis and 40 across Indianna into Ohio and down 35 to WVa and Rt 60 home through Charleston, Gauly Bridge, Sam Black Church.

With some exceptions, we did most of that trip NOT on interstate highways, it was a "Road Trip", to see America along the roadside, and interstates don't show you that.