Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - anyone using premium gas ?
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Old 08-15-2012, 03:20 PM   #456
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Location: Paullina, IA
What I Drive: 2012 Red Candy Sedan

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Here is something I find interesting. I've been using E85 exclusively for the first 2500 miles. Today I was getting low so stopped at the blender pump at the town ten miles away and as hard as it was to do, I put in E30 instead. The AFE in the dash was reading 31.6 and when I actually calculated it out it was 30.5 when I filled to the brim with 10.33 gallons. I figure I had about 1.5 gallons of actual ethanol left and added 3.1 more from the E30 making it about E40. By the time I drove the ten miles home the AFE was on 42.5 so if you guys are right, if I put straight E0 in it should get about 60 mpg. The E30 is priced 30 cents more than E85 and 30 cents less than E0 87 octane. E30 was $3.399.
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