You trying to scare the life out of me?
I must confess I hadn't given it a thought but it turns out I'm OK. I filled up with Joe Gibbs and it comes in US quarts/.946 liters phew.
I should remember that, when dad came home from the war he had one or two souvenirs including a US jerry can and I used to get sent to the corner shop for a "gallon" of paraffin/kerosene and we always wondered why some ended up on the floor!
stuey