Cenex - CENEX
2063 S. Garner Lake Road, Gillette WY
307-257-2068
Ethanol-free octane ratings: 91
GPS coordinates: N 44.27590 W 105.44788 (located from address)
Posted by bpalone, April 15, 2019 18:05 CDT
Not tested, only going by placard on pumps.