What Happens If You Overfill Engine Oil?

[AdamRose]

Symptoms of overfilled engine oil: 1. Creates significant resistance to high-speed rotating crankshaft and connecting rod mechanisms, resulting in reduced power output; 2. Increased oil entering the combustion chamber worsens exhaust emissions, potentially causing catalytic converter poisoning and damage in severe cases; 3. Increases vehicle fuel consumption and oil burning. Conversely, insufficient oil fails to provide adequate lubrication to engine components like cam followers and valves, leading to part wear. Engine oil, also known as engine lubricant, performs multiple functions including lubrication and friction reduction, auxiliary cooling, sealing and leakage prevention, rust and corrosion protection, as well as shock absorption. It is often referred to as the 'lifeblood' of automobiles.