Can't believe it would ever do that John, what would be the point?

Regarding miles to empty reading, it will drop dramatically if you drive hardish especially shortly after an average mpg reset because the latter will drop dramatically as well.

As you can see the fuel level sensing is quite complex and it would only take one of those level sensors to go u/s to really mess it up.

[Linked Image]

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone