Our highest easily available oxyginateds are E10 and occasionally I have seen 15. And currently at 1.10/gallon Can., that's perhaps equivalent to $2.92USd/gal US
Currently E85 is fleet only, so I have been told.I've never even seen an E85 bowser.
Now If I could find E85,locally,and if it was readily available; I would sure like to re-engineer my engine to burn it.But before I get excited about it, If it costs half as much, but I have to burn twice as much of it,..........I'd have to really think it over. But since it doesn't cost half as much up here, but rather more than 87E10 (87 averages maybe 1.15/liter annually, or $3.15US/USg); I'm in no hurry, cuz that would just drive my cost per mile waaay up..I'm a streeter.