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I bought e85 right out of the pump at the Sunoco station on the corner of Woodward and Square Lake rds. about a month ago and it tested at Ninety-5%.
I bought a drum of E98 from Fairgrove oil early last year so I could "sweeten" up some E85 that tested at 74% for a dyno session. Get an alcohol content tester, a drum of E98 and blend your own.
http://www.fairgroveoil.com/e98.html
http://www.fairgroveoil.com/e98.html