What Type of Engine Oil Should Be Used in Northern Winters?
3 Answers
In northern winters, it is generally recommended to use 0W30 grade engine oil, as the winters in northern China are relatively cold, and choosing a slightly lower viscosity is more suitable. The SAE lubricant viscosity classifications for winter oils are: 0W, 5W, 10W, 15W, 20W, and 25W. The symbol 'W' stands for winter, and the smaller the number before 'W,' the lower the low-temperature viscosity, the better the low-temperature fluidity, and the lower the applicable temperature. Engine oil consists of two parts: base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while additives can compensate for and improve the shortcomings of the base oil's performance and impart certain new properties, making them an important part of the lubricant.
As a car owner who has lived in the north for many years, I have experienced multiple instances of engine starting difficulties during harsh winters, deeply understanding the importance of choosing the right engine oil. It's best to switch to low-temperature, low-viscosity oils in winter, such as the 0W series like 0W-20 or 0W-30, as they maintain fluidity in extremely low temperatures, preventing excessive viscosity during cold starts that can wear out the engine. I once used the wrong conventional oil, leading to failed morning starts, wasting time and damaging the car. It's advisable to follow the vehicle manual's recommendations—use the specified grade for new cars, while older cars can opt for slightly thicker oils like 5W-30. Additionally, shorten the oil change intervals, checking approximately every 5,000 kilometers, as low-temperature oils are prone to oxidation and thickening, affecting engine lifespan and fuel efficiency. Don't skimp on quality to save money—safe driving comes first.
I place great emphasis on winter driving safety, especially in the severe cold of northern regions. When selecting engine oil, I insist on using grades that start with 5W or 0W, such as 5W-30, as they exhibit minimal viscosity changes in low-temperature environments, ensuring smooth engine starts. If temperatures frequently drop below -20°C, 0W-30 is the superior choice. Before each oil change, I make it a habit to flush the oil system to prevent sludge buildup that could cause blockages and affect oil pressure. Oil quality should never be compromised; I always choose API-certified oils like SN grade to protect engine components from wear. During winter, it's also advisable to regularly check oil levels and color, replacing it promptly if it turns black to ensure smooth and safe driving, preventing unexpected breakdowns.
