Epa raw data on the 2019 EcoBoost Mustang has 46.8 mpg for the 10 speed auto and 44.0 mpg on the manual. That is the old style, unadjusted highway rating which is more of a low speed steady highway number but still does include some variation in speed and the acceleration up to speed.
PS a 2019 Civic R is 40.2 mpg in the same test so the Mustang is 10-15% better.
Last edited by Hersbird; 04-16-2019 at 04:05 PM..
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