You guys are going to say I'm full of it but I'll remind you I drive for a living and fuel mileage is a big deal when you drive a semi-truck that gets 6 to 7 MPG. I average about 21 MPG in my 5spd GT but I left home one day during a pretty good rain storm and drove 186 miles. I kept my speed below 60 the entire trip and took it real easy on the throttle. My mileage came out 30.7 MPG when I pulled into Oklahoma City. I suspect that's about as good as it's ever going to get.
YOU ONLY GET 8??? I had an 02 GT manual with the ram air, that got 20 to 25 average, the new baby (an autotragic) averages 20 city/ up to 32 hwy depending on my speed, mountain driving over the Rockies I40 to I5 to Canada with the AC on the whole time, it was 112 outside.8 MPG
Not bad, I have the 4.6L and it responded beautifully to airflow mods (CAI, long tube headers, x-pipe w/high flow cats, and straight flow mufflers) originally got 15/21 and after mods I get 18/29. I'm sure the 5.0 responds the same, go for it when you get the money!2012 GT 6 speed and don't know what rear end yet. Just one trip so far. Drove from Vernal Ut to Rock Springs WY and averaged 20 mpg. I wasn't driving like a looney but I wasn't exactly driving for economy either.
Drive more uphill than down over two mountain passes. Started at 5,300' and ended at 6,400'.
I'd say not bad, better than my F-150 ecoboost gets on the same drive. I have a lot of junk in the toolbox on the pickup, and slightly bigger tires but I'd of never thunk it.