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.
'09 Pleasure Way Lexor, Chevrolet Express 3500 chassis, 6.0L V8
Last RV, 2005 NRV Dolphin 5342 (2007-2014)