I'm beginning to think they did something massively wrong while measuring fuel.
Been mulling ideas on how to measure fuel consumption, to minimize errors. You can fill a car to the top, shake it, fill it again, shake it, fill it again... and then let it sit overnight and the next day it will still take more fuel.
Unless you have a good source of cheap temporary installation fuel cells, it's hard to get accurate numbers.
Perhaps if you could unbolt the tanks to weigh them...
