Will adding too much engine oil affect the engine?

[MacHannah]

Adding too much engine oil can have several negative effects on the engine, including the following aspects. 1. Increased fuel consumption and reduced power. If too much oil is added, the oil level becomes too high, causing a significant portion of the crankshaft to be submerged in the oil. This increases rotational resistance as the crankshaft churns the oil. 2. Accelerated carbon buildup and damage to certain car components. As the crankshaft churns the oil, a large amount of oil can be splashed onto the pistons and cylinder walls, entering the combustion chamber and burning. Carbon buildup has long-term effects on power and fuel efficiency. 3. Oil leakage from the crankshaft oil seal and shortened oil lifespan. The excessive churning of oil increases pressure inside the crankcase, which acts on the crankshaft oil seal, accelerating its aging and deformation, ultimately leading to leaks. It also speeds up the oxidation and degradation of the oil, shortening its service life. 4. Worsened exhaust emissions, severely affecting the lifespan of the catalytic converter, and may even directly damage it.