There has been a lot of debate about different Gas. This post is just intended as information. It is the contention that gas that is not a Top Tier gas can leave up to 18X's the deposits in your engine and rob you of performance and mileage. (According to this link) What's in your Engine?
Gasoline retailers must meet the high TOP TIER standards with all grades of gasoline to be approved by the automakers as providing TOP TIER Detergent Gasoline.
In addition, all gasoline outlets carrying the brand of the approved retailer must meet the TOP TIER standards.
Additional gasoline retailers are added to the TOP TIER list as they meet the standards. The retailers known to be on the TOP TIER list are shown below
TOP TIER Licensed Retail Brands 76 Aloha Petroleum Amoco ARCO Beacon BP Break Time Cenex Chevron CITGO Conoco Co-op Costco CountryMark CountryMark Plus Diamond Shamrock
Entec Esso Express Exxon Holiday Kwik Star Stores Kwik Trip Mahalo MFA Mobil Ohana Fuels Petro-Canada Phillips 66 PUMA QT Quik Trip Road Ranger Shamrock Shell Shell (Puerto Rico) Shell V-Power Shell V-Power NiTRO+ Sinclair Standard SuperAmerica SuperFuels Tempo Texaco Tri-Par
TOP TIER Licensed Companies Aloha Petroleum Ltd BP Products North America Inc. Chevron Products Co. CHS Inc. CITGO ConocoPhillips Costco Wholesale Corp. CountryMark Cooperative LLP Entec Stations Inc. ExxonMobil Oil Corp. Federated Co-operatives Ltd. Hawaii Petroleum Holiday Stationstores, Inc. Imperial Oil Ltd. Kwik Trip Inc. MFA Oil Company Northern Tier Energy, LLC (NTE) PUMA Energy Caribe, LLC QuikTrip Corp. Road Ranger LLC Shell Oil Products US Sinclair Oil Corp. SOL Puerto Rico Ltd Suncor Energy Inc. Tesoro Refining & Marketing Co. Tri-Par Oil Company U.S. Venture Inc. Valero Marketing & Supply Co.