4 ms·BP gas stations use green for their unleaded gas pumps and black for diesel. Big dumbby gymbeaux 3y agoBP gas stations use green for their unleaded gas pumps and black for diesel. Big dumbtoast0 3y agoAs they should, they're British Petroleum, right? All their pumps should be standard across the world, and in England, the custom is the diesel is default and 'petrol' is not.gymbeaux 3y agoInteresting. Who’s to say which configuration is the “more correcter?” In the US it’s a PITA.