Joe Gibbs Fuel Defender ...Yes/No?

[WardL]

All branded gasoline already has additive packages that include corrosion inhibitors. The downside to corrosion inhibitors is they can cause injector fouling. I don't know how fuel can "wreaked havoc" on one particular carb and not so much on other carbs. Maybe you need to buy your fuel somewhere else? Under normal circumstances all snake oil is snake oil. You don't need any other additives in your fuel. The use of snake oil frequently does have a very positive emotional effect because one might think they are helping a problem. Thus, the purchase makes them feel better. The engine, not so much....