Does exceeding the oil level limit affect the engine?

[DelTimothy]

Exceeding the oil level limit does affect the engine. If too much oil is added, the resulting hazards include reduced power, increased fuel consumption, more carbon deposits, worsened exhaust emissions, and engine oil leaks. When the engine is running, the crankshaft and connecting rods inside rotate rapidly. Since the crankshaft stirs in the oil, excessive oil pressure makes it harder for the crankshaft to rotate. If there is too much oil, it will interfere with the crankshaft's rotation, leading to reduced engine power output. There is a yellow pull ring in the engine compartment, which is the oil dipstick. When pulled out, there are two marking lines or sometimes two holes at the lower end of the dipstick, indicating the upper and lower limits of the oil level. The oil level must be maintained between these two marks to be normal—neither too much nor too little.