over the years my company has worked in several petroleum plants throughout the USA.
It is true that many oil and fuel products are produced and sold from one location, but in some instances the petrolum or fuel have additives that are added during the manufacturing process and sold seperately, Kind of like made in their own seperate batches or having their own receipe.
When gasoline finally makes it to a petrolium facility or terminal there is no additional additives added to the product. The product they have in the holding tank will go out to which each filling station that orders it.. Regardless of the brand or company logo.
x3 on that pumping your gas in the morning.......