i have 373s and I get between 17 and 21 depending on my driving style. i get 5-10 on race days.

Damn you. :biggun: lol

3.31's are a better gear for a blown car anyways. :win:

3.55s FTW

19.2avg. Auto 3.73's

Just an update, the new engine is getting 20 city and 27 on the highway. I am averaging 22-23mpg now with no other changes (~18% improvement). I don't understand why it would be any different, but I'm glad to see mileage getting better instead of worse, lol.

This is a 2013 service replacement engine and Ford's latest calibration.

Are you sure that other motor didn't have a tune on it?

No, this car has never had a tune. I bought it off the lot with 104 miles on it, so I think I would know if it had ever gotten one. lol

I'm getting about 16mpg average city/hwy right meow.

On the way back from Vegas I was reading between 19 and 20mpg, but I calculated 24+ by hand. I was thinking that is because I'm running the can tune on it currently. Guess we will see once I have a chance to get it custom tuned.

I got 25.5 in dash on the way home last Wednesday (310 miles), averaging 70-75 mph over the entire trip. No a/c and windows down majority of the time.

On the way back, I got around 23.5, but that was fighting nasty traffic south of Conroe on 45, and running no slower than 75 once the traffic opened up (hit 100 a few times :D)

Update - still un-modded, averaged 22.4 on the Powertour taking the tour routes to Memphis....included a little spirited driving and a few decent burnouts.

All hwy on the trip home...using the cruise at 70mph most of the way, netted 26.6. Turned over 10K miles on the trip home too.

Not bad for a portly 3.73 car IMO.

Nice! I bet that was a fun trip. One of the things on my car guy bucket list to do!

How's your MPG?
 

I get 13ish on my daily commute and was stunned @ 25 I got on my trip to Athens last weekend!!!

13-15 in my normal commute but its only 5 city miles each way with a short burst ( or two) :) I've yet to get a good hiway trip.