I think If ya'll still have ARCO stations it is only a brand name like "Castrol".
The ARCO(Atlantic Richfield CO) of Old is gone. I believe BP took over the Remainder of ARCO holdings in 2001.
Anytime I hear about a certain brand of gas not performing well I have my doubts considering that I have worked on projects constructing loading docks for fuel trucks. They buy from whomever, whenever regardless of the brand on the side of the truck or the station.. They do add some additives to the truck if it isn't a proprietary gasoline blender. There are several Chevron stations for example that are not in a cheveron blending networkk.. They simply add a prepackaged additive to the trucks at the dock.
To the best of my recolection one distributer handles all the gasoline deliveries in Corpus Christi for example. To severla differnt brand, Shell Chevron, sams club,Coastal, CITGO, HEB, Diamond Shamrock and Valero. There are several gasoline producing refineries in town, (Flint Hills, Coastal, Valero, Citgo(x2). The same distribution trucks go to all the Refineriy loading docks and deliver to several fuel stations. To shipp Exxon gas from Houston for example would be poor economics.
Do some Brands have better standards and practices for there fuel stations? Yes they do. But Gasoline is gasoline , it has to meet minimum standards and some brands use additional additives and detergents. Poor storage, water intrusion into the storage etc do to poor standards can deservably give certain brands a poor image.