Shell

According to the website:

Shell is a British multinational oil and gas company that operates a network of gas stations in the US including this one in Elk Mound, Village of, WI. They offer a variety of unleaded and diesel products, including Shell V-Power NiTRO+ Premium Gasoline and Shell Midgrade Gasoline. Shell stations also have car washes, ATM cash machines, and convience shops at select locations.