We decided not to track individual fuel-types or octane ratings separately unless they require a different engine to run (diesel vs. gas), so I don't think we'll be adding a checkbox for ethenol. But you can either note the ethenol mix in the notes field to help you remember, or tag any fuel-ups with 'ethenol' or 'ethenol10' or some other specific tag. That way you could group similarly tagged fuel-ups together in the future.
__________________
|