Most gas these days has 10% ethanol included. The ethanol mix works fine in modern cars, and that is 10% less gas to source.

But will I instantly pull over in my Cadillac if a shop advertises ‘straight’, pure gas?

Why yes, yes I will.

This station also charged a premium for the ethanol-free juice, but I considered it a pay to play treat.

Due to the high traffic and stops on our tour today no mpg comparison to report, but I like getting the pure stuff for a change –then back to the E10 the rest of the trip.

Would you pay extra for straight gas with no ethanol added if it were available locally?