Is it okay if the engine oil is 1 cm above the upper limit?

[AshlynDella]

Different vehicles have different situations. It is not a problem if the engine oil is 1 cm above the upper limit when measured in a cold engine, but if it is 1 cm above the upper limit in a hot engine, there might be an issue. Below is a detailed explanation of this issue: 1. The oil level is higher in a cold engine: Generally, when measuring the engine oil level in a cold engine, the oil distributed inside the engine will flow back to the oil pan under gravity, resulting in a higher oil level measurement. 2. The oil level is lower when measured in a hot engine: In a hot engine, the oil is distributed across various lubrication surfaces, so the actual oil level is relatively lower. At this point, the actual oil level height is closest to the oil level height during engine operation, most accurately reflecting the effective oil level.