is arco gasoline top tier?
It's not. Most major brands meet Top Tier standards. These include 76, ARCO, Chevron, Exxon, Mobil, Phillips 66, Shell and Texaco. However, there are also many lesser-known brands that meet Top Tier standards, including Break Time, Costco, Fast Fuel, Holiday, Kwik Star, QuikTrip, Ranger Stallion and Valero.