Is it harmful to add a little too much engine oil?

[VanElisa]

Adding a little too much engine oil is harmful and can cause damage to the car. The disadvantages of adding too much engine oil include: 1. Damage to the three-way catalytic converter; 2. Insufficient lubrication for the engine; 3. Reduced engine output power; 4. Increased internal engine resistance; 5. Increased likelihood of carbon deposits in the engine; 6. Shortened lifespan of oil seals, potentially leading to engine oil leaks. Engine oil, also known as motor lubricant, plays a role in lubricating and reducing friction, assisting in cooling, sealing and preventing leaks, preventing rust and corrosion, and cushioning shocks in the engine. It consists of base oil and additives.