What are the reasons for rapid oil consumption?

[MacWilliam]

The reasons for excessive oil consumption are as follows: 1. Piston ring wear or damage, changes in the piston ring gap angle, causing large amounts of oil to enter the combustion chamber resulting in oil burning. 2. Severe cylinder liner wear also leads to oil entering the combustion chamber and burning. 3. Excessive oil level in the crankcase, or aging and cracking of oil seals at locations such as the crankshaft causing oil leakage issues. 4. Poor crankcase ventilation, preventing fuel vapor in the crankcase from being discharged, leading to increased crankcase pressure and oil seepage. 5. Excessive engine speed; modern engines are high-speed engines, and excessively high speeds will inevitably increase oil consumption to some extent.