I just about ran out of gas yesterday nowhere near Meiher, had to put in $5 of 87 octane from another station, and drove about 50 miles before filling up today, which makes the calculations difficult. Not sure exactly how much was left in the tank, nor what it's ethanol% really was. Just going to assume that it all was there this morning, and calculate accordingly (adding 3.73413 gallons of 87 octane to my calcs)
Gallons E85: 4.014
Price E85: $1.189
Gallons 87: 11.88218
price 87: $1.289
tank ethanol %: 24.11
tank octane: 90.288
The car is running great, no issues so far.
I got my Scangauge hooked up, looking at ignition timing, to get a feel for what it runs with an ethanol mix. At some point I'll have to run straight 97 octane gas, and maybe premium, for comparison.