GLEN STUBBE � gstubbe@startribune.com -- Thursday, May 1, 2008 -- Minneapolis, Minn. -- Rich Burton, a sales rep for Langford Tool & Drill, Minneapolis, filled his Chevrolet Suburban with E-85 fuel at a Minneapolis Mobil station before heading to Souix Falls on a sales call. Just under 23 gallons cost him $69.00 at $2.87 per gallon. Regular unleaded fuel was $3.52 the same morning.