Seems like a lot of options. Here is one of the pumps.
Only four nozzles. Not sure how you get the other three options.
Speaking of gas stations
Portuguese Coastal, Part of the Primitivo, Week in Vigo
Seems like a lot of options. Here is one of the pumps.
Only four nozzles. Not sure how you get the other three options.
Two possible explanations. (1) each pumps offer only some of the options, but there is at least one pump that has the option you want. (2) when I was young Sunoco, a back-east gasoline company, offered many options (different octanes). They managed this by mixing premium, the highest octane, with standard (the lowest) in the proportions that matched your request.
I was thinking that they might do some mixing but thought that might be technically complicated but then I’m not an engineer.