What does it mean when engine oil level increases?

[LaMadelyn]

Oil level increase refers to the phenomenon where gasoline mixes into the crankcase, causing the total liquid volume to rise while the actual engine oil quantity remains unchanged. The details are as follows: 1. In modern direct-injection engines, a large amount of fuel is injected during startup. Sometimes due to excessive injection or incomplete combustion combined with high cylinder wall pressure, gasoline may enter the engine oil. 2. Normally, gasoline would evaporate when engine temperature rises. However, during frequent cold starts or in extremely cold northern regions, the engine oil temperature may not reach sufficient levels, making it difficult for gasoline to evaporate, thus resulting in continuously increasing oil levels.