G’day Scotty.. my name is Rowan and I’m a Firefighter from Australia, I’m a big fan of your YouTube channel. Mate I have a question relating to a Wrangler which my dealership hasn’t been able to solve. I have a 2009 Jk 3.8L V6 Wrangler Sport. Since I've had it an engine light appears and disappears consistently indicating a left bank O2 sensor fault, the dealership has replaced the offending sensor 3 times and replaced all of the cat converters, spark plugs, been told the fuel I’m using is not suitable.. any possible thoughts and or experiences?

weak fuel will indeed do that. Complex feedback mechanisms . Here's a test, put in Shell V power super unleaded a few tanks, and if light stays off, it's the fuel