OK, I'm an arse, has never happened before, but due to a petrol station being shut on a major road I was on, I nearly ran out of petrol.
I got down to 0 miles on the fuel computer, then did 2 miles, and then when I found a petrol station, I filled up with 54.01 litres. So theres a spare litre when you get down to 0 miles!
