 What you need, when you need it. What you need, when you need it. 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.