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Old 05-17-2019, 08:51 AM   #32 (permalink)
Vansquish
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Join Date: Apr 2012
Location: Ann Arbor, MI; Madison, WI; Bloomington, IN
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Vansquish - '06 Mazda Mazdaspeed6 Grand Touring
90 day: 32.63 mpg (US)
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Quote:
Originally Posted by hayden55 View Post
I don't believe anybody can get 40 mpg out of a v6 mustang unless they are going 55 mph. The 11-14 v6 mustangs got more like 16 around town and 28 on the highway for the auto.
To be clear, the Ecoboost Mustang has a 2.3L turbo I-4 motor, not any of the 2.7, 3.0, or 3.5L twin-turbo V6 motors that Ford/Lincoln offer in other applications.

The I-4 is very closely related to the Focus ST motor, and the L3-VDT motor in the Mazdaspeed3, Mazdaspeed6, and Mazda CX-7. Having run a lifetime average of above 32mpg on the highway in my nearly 3600lb, AWD, very short-geared (70mpg is just under 3100RPM) Mazdaspeed6, I can say that I could definitely believe a more modern incarnation of the engine with less driveline losses could achieve closer to 35 or 40mpg under the right conditions.
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