Demand for high-octane fuel is at its lowest in nearly a quarter of a century and is now primarily consumed by a core group of luxury vehicle owners -- and even some of them are putting lower-grade fuel into their tanks to save money.
Gas station owners say they are pumping so little premium that it can take three or four weeks to sell their high-octane inventory, as opposed to a couple of days for a delivery of regular gas.
Premium gas is making up only 3.3 percent of E-Z Mart's gas sales this year, Hubbard said.