“They don’t all do that, sir”
Sounds like a classic MMC explanation! How about "Well, it's a Morgan - you have to work on it.". Or "Oh, we have never heard of that before!"
By the way, what is the max range you guys get out of a full tank?
I have the 2018 Plus 4 GDI but can rarely beat the 600km, making it more than 9L per 100km (or about 25mpg) with the 55L tank. I can't imagine that a lightweight like the Mog with an engine built for a quite heavier car would drink that much...
Moreover, I recently worked on the engine and disconnected the battery. After the next start, my average fuel consumption was at 260L/100km - what a spaceship! Any ideas on how to reset this ridiculous indicaton?