Posted 3/14/2019 08:28 (#7379589 - in reply to #7379586) Subject: Not at higher blends..
30% ethanol realizes about the same gas mileage in "most" vehicles as straight gasoline.
And as we move to higher compression more fuel efficient engines.. which require higher octane.. that spread narrows.. though you STILL NEED the OCTANE...
... and would PREFER getting the OCTANE WITHOUT CANCER!!