It's more marketing thinking you are getting a better price,diesel is more refined now than gasoline,you can get twice the amount of gasoline than diesel from a barrel of oil,they offset that with Bio like Soybeans,then we have politics with our gas and diesel,they have sold off 300 million barrels of oil from our SPR trying to get prices down before election time.Gasoline and Diesel has always been subsidies in the USA to keep the cost low and they trying to cut that part out,when they do we will paying just like the rest of the world