Is 5W30 Engine Oil Suitable for All Seasons?
2 Answers
5W30 engine oil is suitable for all seasons. Engine oils can be classified into full synthetic oil, semi-synthetic oil, and mineral oil based on their grades. The 'W' stands for winter, and the number before 'W' represents the oil's fluidity at low temperatures—the smaller the number, the better the fluidity. The number after 'W' indicates the oil's viscosity grade at high temperatures (100°C)—the larger the number, the higher the viscosity, and the better the protection for the engine. Engine oil is a substance enhanced with additives in base oil, primarily containing anti-wear additives, detergents, dispersants, and multi-grade oil viscosity index improvers.
I've been driving for almost ten years and use 5W30 oil all year round without needing to change it. This oil has good low-temperature fluidity, making it easy to start the engine even at -30 degrees Celsius, and the oil film is thick enough for high-speed driving in summer. I once asked a senior mechanic at the 4S店, and he said 5W30 is designed to handle various temperatures. However, it's worth noting that my car is an ordinary family sedan. If you're into off-roading or drive an older German turbocharged car, it's recommended to use a 40 viscosity grade in summer. As long as you change the oil on time with genuine products, there are usually no issues.
