Question: is murphy gas top tier?
Answer: Look for Top Tier Gasolines But not every major is Top Tier (just most of them). Costco is a Top Tier seller but not currently BJ's or Sam's Club. All of the top 10 gasoline retailers, by service-station count, are Top Tier: Shell, Exxon, Chevron, Speedway, BP, Circle K, Mobil, Sunoco, Valero, and QuikTrip.