What is the difference between 0w30 and 5w30 engine oil?
2 Answers
The differences between 0w30 and 5w30 engine oil are as follows: 1. Different low-temperature fluidity: 5w30 engine oil can flow normally at -30 degrees Celsius, while 0w30 engine oil can flow normally at -35 degrees Celsius. 0w30 engine oil has better low-temperature fluidity. 2. Different viscosity: The number after the letter W in the engine oil model indicates the viscosity of the oil at 100 degrees Celsius. The larger the number, the higher the viscosity, and 5w30 has a higher viscosity. The higher the viscosity, the better the protection for the engine at high temperatures. Generally, car owners will choose engine oil based on the minimum temperature of the region they are in.
When it comes to engine oils 0W30 and 5W30, as an experienced driver with years behind the wheel, I must say the main difference lies in cold-weather starts. The numbers before the W (0 and 5) indicate low-temperature fluidity - the smaller the number, the easier it flows in freezing conditions. For instance, 0W30 starts smoothly even at -30°C to -40°C, quickly lubricating the engine without wear; while 5W30 performs acceptably around -20°C but may become too viscous in extreme cold. The 30 after W represents the same high-temperature viscosity, offering similar engine protection. Choose based on local climate: 0W30 is safer for harsh winters in Northeast China, whereas 5W30 suffices for year-round use in southern regions. I recommend regular oil changes following the vehicle manual - don't cut corners to save money, as improper oil can damage the engine and lead to costly repairs. With today's technological advances, this careful oil selection truly extends vehicle lifespan - quite a contrast to the limited single-grade options of the past.
