20% spread of E85 on the Turnpike

Stopped at the Sunoco station on the Pa. Turnpike and was shocked to find the E85 price decreased to $2.28 while the E10 increased to $2.84. That is a 20% price spread. I promptly put in $5.00 worth of E85 and the rest of E10. When I arrived home after skiing in the Laurel Highlands, my Ford dash mileage read 28.4 mpg. This includes driving in the AM when temperatures were in the mid-teens and on the way home when the temperatures were in the low 40's. Got to love the 20% price spread which is similar to what the many of the station in the corn belt offer.