What are the reasons for Volvo engine oil burning?
2 Answers
Volvo engine oil burning is caused by incomplete oil-gas separation in the exhaust valve, wear and aging of oil seals, severe wear of piston rings, etc. Engine Introduction: An engine is a machine that can convert various forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. Engine Working Principle: The working principles of two-stroke engines and four-stroke engines are different, with most car engines being four-stroke. The working cycle of a four-stroke gasoline engine consists of four piston strokes: intake stroke, compression stroke, power stroke, and exhaust stroke.
I've been driving Volvos for years and have encountered the oil burning issue several times. It's mainly caused by worn piston rings—those circular pieces inside the engine lose their sealing ability as they age, allowing oil to sneak into the combustion chamber and burn. Additionally, if the valve guide seals deteriorate, oil can seep through there too, especially noticeable during high-speed driving or hard acceleration. Turbochargers with poor sealing can also lead to oil leaks, which is quite common in turbocharged (T) versions of Volvos. Another culprit could be a faulty PCV system, which is supposed to balance internal engine pressure. When it fails, oil might get sucked into the intake manifold and burned. I believe preventive measures are crucial, like using high-quality oil and sticking to OEM parts for maintenance to delay wear. Also, keeping an eye on the oil level gauge during daily driving is important, as both overfilling and underfilling can cause issues. In short, regular check-ups at a professional shop are essential—don't wait until the engine needs major repairs. That's what I've learned from experience.
