The window stickers of 2015 Mustang models are now showing EPA data for the 2015 Mustang EcoBoost (manual) and the Base V6 Mustang for both auto and manual transmissions. While the V8 data is not yet viewable, this is enough to make some educated guesses.

Here is how the MPG data breaks down so far:

Mustang EcoBoost (manual): City 22 / Highway 31

V6 Mustang (manual): City 17 / Highway 28

V6 Mustang (auto): City 19 / Highway 28

Check out the window stickers in the FORUMS.