What Causes Engine Oil Consumption in Cars?

[GiannaLynn]

It may be due to oil burning faults or engine oil leakage faults. Here is extended information: 1. Stuck piston rings prevent oil from returning to the oil pan, causing oil shortage and oil burning phenomenon. 2. The seal valve of the turbocharger prevents oil from returning, resulting in oil burning where the oil doesn't actually participate in combustion. This can cause the car to lose one liter of oil per 1000 kilometers. 3. Improper timing belt replacement operation blocking the crankcase ventilation port, preventing oil from returning. This issue often occurs in vehicles with special design structures, such as Citroen and Peugeot's 1.2T engine. This engine design immerses the timing belt in the oil pan, requiring belt replacement every 40,000-50,000 kilometers. Due to the special design, inexperienced repair shops may improperly block the crankcase ventilation port during belt replacement, causing oil to not return and resulting in the so-called oil burning phenomenon.