What are the negative effects of leaded gasoline to the engine?

Leaded gasoline can cause significant damage to engines by forming deposits on spark plugs and valves, leading to misfiring and reduced performance. The lead compounds can also corrode engine components, resulting in increased wear and tear. Additionally, leaded gasoline can foul the fuel system and catalytic converters, ultimately leading to costly repairs and decreased fuel efficiency. Overall, the use of leaded gasoline can significantly shorten an engine's lifespan and impair its functionality.