What a wonderful thread I hadn't found when searching for a slightly (maybe) different issue :

I can't fill my tank fully... The pump stops and won't put anymore in when test 6 shows 78L

Last time I filled up, I was a bit below a quarter, it showed : 8.3/ 9.3/ 17.6L
After filling up about : 51.1/ 27.0/ 78.1L (its coherent with the 60 liters I put in).
124km (about 80 miiles) later : 36.8/ 19.8/ 56.7L

The fuel gauge doesn't go to the top of course. and I haven't pushed it to the bottom (lack of faith).

When I bought the car a few months back, it had a fuel gauge that wouldn't work and I replaced the fuel sender (the one without the pump) and found the old one had a broken plate where the floater bar contacts.

Do you have an Idea what I should explore or what I should poke at?