[Dusten]

Checked mine today. 10.8 with about a 60/40 city/hwy split

 

[Kwik SC]

I averaged 16mpg pump gas highway trip from nyc to pa recently. E85 is 9mpg. This was with id1300's

 

[Ct.TOPGUN]

I got about 17MPG when I had the 3.73 gears. Now I get 15-16 with the 3.55s(did not expect that drop). My mileage is predominantly highway as I rarely take the built truck out for any reason other than to race.

 

[MattACK]

I got 15 between Atlanta and Charelston doing between 35-45 mph due to icey conditions on the roads. Best I've ever gotten.

Because I have a 12gal fuel cell, I'm very happy to get 10mpg the way I drive.

 

[Lafeva]

I usually average 14-15 with my old 00. Built motor heads cams magnum powers 3.55

 

[PhLoBuS]

I run E-85 so most likely 8-10mpg around town

 

[1qwktrk]

8-11 mixed driving on e85
Best is about 13 all freeway also on corn.

 

[svt-BansheeMan]

18.0mpg. e10 fuel. all highway.

 

[grease lightning]

Can get 15 if real light on the pedal but average about 10-12 :smt040

 

[Adam0492]

I get about 10-11 mostly city driving, work is only 10 min from me. Mixed driving

 

[tgarlock]

I got 17mpg when the built motor was in my truck. It should do better in the mustang with the turbo.

 

[Certified Drunk]

2 gallons per mile..., at the track. lol

 

[sb306]

about a 200 mile drive. all freeway doing about 60 got me a tad over 19 mpgs. but thats not my average. lol. It would be hard to get a good measure doing city driving with our trucks. Unless you could drive easy from every light and every stop, but I doubt any of us could do it. A few wot pulls or some spirited driving and your mileage will be shit. even though overall our built motors will still do pretty decent if drivin easy. theres no reason for them to be much worse than stock. Except under boost of course.(way worse but more fun)

 

[SVTdriver]

Best i did was 17 on the hwy but i didnt drive slower than 70mph, sometimes 75

I average 10 but i drive hard

 

[Bird]

17mpg hwy cruising at 70 / 12.5 city - used to get around 14.5 city, but that was before the 2600 stall torque converter. Seriously thinking about putting the stock converter back in now that it's no longer raced.............. (the 2001 Lightining).

When I was breaking in the new engine on the 02, I got about 6 mpg - no fun on a 10 gal tank.

Bird

 

[josh843]

Averaged it out the other day to about 7.9, but it's hard to stay out of it:rockon_ford
Filled up today and going to try and take it easy and see... [smilie=3g

 

[ridethelightning]

Averaged 15mpg going from Palm Beach Florida to NYC when I first bought the truck. Loaded in the back with a passenger.

 

[dude lightning]

Just under 16 MPG driving to and from the shore but that is with a soft pedal.

At the track 4 MPG per pass. Basically use 1/2 gallon of race fuel per pass. Pit road to burnout box, 1/4 mile pass, 3/4 mile shutdown and trip back to pits is about 2 miles.