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Message: <blockquote data-quote="ReggieT" data-source="post: 1043386" data-attributes="member: 74258"><p>Just filled up at Sams and my mileage was a dismal 8.5 mpg.  But, here is some things that may have affected the mileage.  My 04 truck is flex fuel and I waffle between E-85 and regular 87 octane.,  Last time I filled up, which was in May, I filled with ethanol and my mileage is always a little worse with that. but, never this bad.  Also, it has been 4 months since I filled it up.  I do not drive the truck a lot.  So, Maybe ethanol evaporates a little faster.  I just read an article by Edmonds where they drove from Las Vagas to San Diago  and according to them,  Flex fuel mileage was so bad that it would not make sense to use it. They got 16 mpg with regular and 12 mpg with flex.  Maybe someday, the engines will be improved enough to make ethanol work, but not my 04 with 180K miles.</p></blockquote><p></p>