Focus Fanatics - View Single Post - Car seems faster with ethanol
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Old 10-07-2012, 03:33 AM   #7
StingRay
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Join Date: Jul 2009
Fan#: 67421
Location: Phoenix, AZ
What I Drive: 2013 Ingot Silver ST

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I'm not sure on the 2012's but my '13 is flex fuel capable, so yes the fuel system is designed for it. The new computer system on the MK3 is supposed to be able to adapt to any amount of ethanol content and change the tune to achieve optimal AFRs, or at least that's what I've read. Technically the car could add more timing and therefore make a tad bit more power, but I'd have to see a dyno sheet that proves it's making more power because I wouldn't think the factory ECU has performance in mind when it changes the tune.
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