Back in the day, 250 2stroke scooter:
One run, Llangollen to Surrey escorting another scoot who had bent forks: 130 miles & couldn't get a gallon ( remember them ? ) in
Another run, 26 rapid miles & couldn't get 2 gallons in !
Thirteen mpg - not many will have a 'best' that is ten times the worst
It's as well it was less than half a crown per gallon