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.

Gas combusts very differently from diesel, and putting it in your diesel-powered engine could cause irrevocable damage — just like what would happen if you put diesel in your gas-powered car.

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.