with the geo metro XFI. I was getting 45-46mpg and when I switch to "washed" gas "OR" purchased E0 My fuel economy went to 54-55mpg and STAYED their ever tank until I went back to E10 at which point it immediately dropped back down to 45-46 (winter blend)
In the summer blend on E10 I get 51-54
I hit 59mpg once but that was doing 70-75mph in the suck zone behind a semi for a few hours. :-)
My jeep gets 24 on E0 19 on E10
My van gets 19-20 on E0 13-16 on E10
My Minivan gets 28 on E0 20-21 on E0
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