What is the boiling point of engine oil?
2 Answers
Engine oil boiling point is 400 degrees. Below is relevant information about engine oil: Mineral oil: Mineral oil is the remaining oil after gasoline and heavy oil are extracted from petroleum. Mineral oil is actually a natural oil with many impurities. It is cheaper compared to semi-synthetic and full synthetic oils, but has poorer lubrication for the engine and a shorter service life. Semi-synthetic oil: Semi-synthetic oil is between mineral oil and full synthetic oil. It contains a large amount of anti-corrosion additives to improve the stability and high oxidation resistance of the oil. Full synthetic oil: Among these three types of oil, full synthetic oil is the highest in quality and durability, and also the most expensive. Generally, it can last for 10,000-12,000 kilometers in cars without deteriorating.
The boiling point of engine oil is typically around 300 degrees Celsius, depending on the specific type of oil. For instance, synthetic oils may have boiling points as high as 320°C or even 350°C, while mineral oils are slightly lower, usually between 280°C and 300°C. The boiling point is crucial because engine temperatures can get extremely high during operation, especially near the turbocharger or pistons. If the oil's boiling point is too low, it can evaporate or boil, leading to excessive oil consumption, blue smoke emissions, or premature engine wear. I always pay close attention to my oil's condition, particularly during hot summer months or long-distance driving when engine temperatures can easily exceed 100°C. Oils with higher boiling points tend to be more durable. Regular oil changes and selecting the right oil specification are key—the owner's manual usually provides recommended values. It's also essential to ensure the cooling system functions properly to prevent overall overheating, which can compromise oil performance. In short, the boiling point directly impacts engine longevity, so I take preventive measures against oil burning issues, and using synthetic oil gives me greater peace of mind.
