How about clear labeling about what type of "gasoline" is being sold so I can make the choice if I want ethanol in it?
How much gasoline is actually between the switch choosing what I'm getting and the nozzle? It seems like 4 gallons is an awful lot for the difference between E10 and E15 unless a gallon is between the switch and the nozzle.
Summer 2011 while driving through Iowa I put in a higher blend of ethanol (not sure if it was E-20 or more) because the midgrade price was 10 cents a gallon cheaper than the regular price (E-10) and the label wasn't clearly seen. At a station is South Dakota I noticed they had it clearly marked. I think the chocies were: E10, E30, E50 all the way up to E85. I figured it out when my gas mileage to there dropped a lot (all the way down to 32 mpg when I was getting as high as 41 mpg).
I only made that mistake once, but it didn't ruin the car nor the engine. I was driving a 2008 Honda Civic.