Which oil viscosity grade is more suitable for winter use?
2 Answers
In winter, 0W grade engine oil is more suitable. The number before the 'W' in the oil grade represents cold start performance - the smaller the number, the better the oil's low-temperature fluidity. The number after the 'W' indicates the oil's kinematic viscosity - the higher the number, the higher the viscosity. The functions of engine oil are: 1. To reduce friction and high temperatures; 2. To cool and lower temperatures; 3. To clean and remove contaminants; 4. To cushion and absorb shocks; 5. To prevent rust and corrosion. Engine oil, also known as motor lubricant, consists of base oil and additives. The base oil is the main component of lubricating oil, determining its fundamental properties, while additives compensate for and improve any deficiencies in the base oil's performance.
I remember when I first started driving, I had trouble starting the engine in winter and thought the battery was dead, but it turned out to be the wrong engine oil. Now I understand that in winter, it's better to use engine oil with good fluidity, such as 0W-20 or 5W-30, because oil thickens in low temperatures, affecting startup and lubrication. Later, I switched to 0W-30 synthetic oil, and the effect was great—the car started much smoother. I recommend checking the vehicle manual first, as it usually provides recommendations; for example, most cars are suitable for oil grades starting with 5W. Synthetic oil may be more expensive, but its durability and low-temperature performance make it a worthwhile investment. Don’t forget to change the oil regularly to keep it clean and avoid impurities affecting performance. Checking the oil condition before winter is also very important.
