Catalytic converters on gas engines have been around since 1976, when lead — which is damaging to both humans and catalytic converters — was banned in passenger car fuel.

This much is true. According to The Drive, premium gasoline prevents this. The website notes that this phenomenon isn’t typically harmful to your car’s engine if regular gas fill-ups are sporadic.

Top Tier gasoline contains more effective detergents than federally required, which helps clean fuel injectors and reduce harmful carbon deposits inside the engine.