Does adding more engine oil have any impact?

[SanBrooke]

Adding more engine oil does have an impact, as it can reduce the engine's output power. The following are specific hazards of excessive engine oil: 1. Reduced engine lifespan: When the oil level is too high, the oil becomes diluted, leading to a decrease in viscosity. This results in insufficient lubrication and cooling capabilities, causing cylinder scuffing, bearing wear, and affecting normal engine operation. In severe cases, it can shorten the engine's lifespan. 2. Increased carbon deposits in the combustion chamber: When the oil level exceeds the upper limit on the dipstick, some oil may enter the combustion chamber and participate in combustion, leading to oil burning. This can cause the catalytic converter to fail, rapid damage to the oxygen sensor, increased carbon deposits in the combustion chamber, unstable idle, poor acceleration, increased fuel consumption, and excessive exhaust emissions.