As of October 2008, the rack price of ethanol was $2.51 versus $2.02 for unleaded gasoline--a difference of 49 cents per gallon. The ethanol rack price was 17 cents lower compared to last month's price but 72 cents higher than a year ago. Unleaded gasoline's average rack price took a huge drop of 92 cents from last month's price and reached 22 cents lower than a year ago. This is the fourth consecutive month that the price of unleaded gasoline has decreased. The main factor contributing to the decline is the decreasing price of crude oil.