Premium vs regular unleaded fuel.
I got in a debate with someone that claims premium gas s better gas. I asked him to define better, he said that premium gas:
contains better detergents
give more horsepower
He is wrong on the first three points. The more power is true ONLY if your engine requires premium fuel. He was driving a Silverdo with a 5.3L engine. I told him unless he has re-tuned his ECU with a programmer, running premium was only going to take more money out of his wallet. He refused to believe me and said that his truck just runs better on premium. I stopped the discussion as he has convinced himself of this.
I have noticed that people that run premium gas tend to want to thump their chests a lot more about the automobiles.
You try to tell people that octane is simply a combustion inhibitor and does not contain secret amounts of power. They won't hear of it. Ignorance at its finest.