 The Cowan Center, the Basalt Store, and Locals Corner Aspen are powered by Exxon. In Aspen, you can pump gas 24-7, and the convenience store is open from 6 a.m. to 11 p.m. At the Carbondale and Basalt locations on Saturdays and Sundays only, if you buy five gallons of gas, you get a $5 premium car wash.