As of September 2008, the rack price of ethanol was $2.68 versus $2.94 for unleaded gasoline--a difference of 26 cents per gallon. The ethanol rack price was seven cents lower compared to last month's price but 75 cents higher than a year ago. Unleaded gasoline's average rack price was 16 cents lower than last month's price but 64 cents higher than a year ago. This is the third consecutive month that the price of unleaded gasoline fell. The main factor contributing to the decline is the decreasing price of crude oil.