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Yes I've heard all the horror stories but my experience with running not only E10 but E85 in various NON flex-fuel Fords is:
at concentrations of up to 50% ethanol, economy is basically unaffected
all these years I've never changed a single fuel filter or injector, or any other component for that matter
only issues I came across were hard starting in sub-zero weather when ethanol blend was over 50%, and poor WOT performance with 100% E85 (don't care though because I almost never go WOT).
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