Pricing of E85 has improved. It is now 30 cents less than regular gas.
Gallons E85: 3.507 @ $1.979/gal
Gallons 87 Octane: 10.5 @ 2.279
Ethanol content of tank: 22.64%
Octane of tank: 89.74
Savings per tank over premium at 2.779: $8.06
Getting 30 cents off really increased the savings per tank.