Vintage car difficult to fill up at bowser

Your car and also your mate’s car are both old and you’re filling them with new bowsers that have a higher flow rate that the old tanks can’t handle. It affects lots of old cars, and some not-so-old ones. One way is to avoid using the full flow rates, instead only use ½ to ¾ of the full capacity of the pump, but that can be hard with the filler located down behind the rego plate on the bumper. Your idea of using a hose and funnel so you stand while filling up should be easier, you just need to judge when you’re getting near full and slacken off so you don’t lose too much fuel if it overflows.