400km is 248 miles, which would need to average over 80mpg... not likely.
Sent from my SAMSUNG-SM-N920A using Tapatalk
It's only got a 11.2ltr tank. I think that's around 2.5 gallon? Maybe even less. So would need to be returning at least 100mpg for that range. If that's what it's doing I'll be impressed.