Costco - COSTCO
2350 Box Springs Blvd Nw, Medicine Hat AB
403-581-5700
Ethanol-free octane ratings: 91
GPS coordinates: N 50.06415 W 110.74146 (entered by Denis Tessmann)
Updated by Gavin, April 19, 2020 20:22 CDT
Costco 91 octane has no ethanol, as labeled on the pump. Their 87 octane does contain ethanol, as labeled on the pump.
Updated by Bill, May 10, 2019 13:39 CDT
Called them and they said all of their gas has ethanol.
Updated by piker, August 22, 2018 20:15 CDT
changed the octane
Posted by Denis Tessmann, August 22, 2018 20:13 CDT