I have heard of so many who have complained of bad or watered fuel. I never have (knock on wood), even in the bad old carburetor days. Lucky I guess?
I have experienced condensation in the gas tank that caused icing in the fuel line in winter. That is when I discovered Heet.
2017 Coachmen Orion, Ford Transit 3.7L: previous
'09 Pleasure Way Lexor, '05 NRV Dolphin 5342