Maybe we can shift the discussion to - what you can do to prevent things like this?
So, when can you recognize getting the wrong fuel?
1. its written on the fuel truck or the tap
2. it smells wrong when put in the tank
3. the color of the tank filler does not match the fuel pistol (not on every field)
4. at drain it does not look blue
5. at confirmation of filled tank by open & look at it it smells wrong (again)
6. warming up the machine shows rough run
7. ? what else