hehhehee, it feels good to get at least one guy! Sorry drg, hehe, NOT.
Actually our gallons are 4.54 litres in comparrison to 3.78 litres in a U.S. gallon or five of our gallons make six of yours.
So when I am travelling in the US and I want to check my mileage, I divide the number of gallons by six and multiply by five to see how many mpg I am getting in Cdn measure. Obviously for you guys coming up here, you would do the reverse.