What are the effects of switching from 5w20 to 0w20?
3 Answers
Switching from 5w20 to 0w20 generally has minimal impact. The main difference between 5W20 and 0W20 lies in their low-temperature resistance, with 0W offering better performance in cold conditions and improved overall fluidity. Using 0W can provide a better experience, especially in colder regions where the difference is more noticeable. Below are the key differences between 5w20 and 0w20: 1. Low-temperature fluidity of the oil: The smaller the number before the 'W,' the better the oil's low-temperature fluidity, indicating a lower usable environmental temperature and better engine protection during cold starts. 5w means the oil can flow normally at -30 degrees Celsius, while 0w means it can flow normally at -35 degrees Celsius. 2. SAE viscosity rating: The viscosity rating indicates that the oil is a multi-grade oil. 'W' stands for WINTER, and the number before 'W' represents the oil's flow performance at low temperatures—the smaller the number, the better the cold-start performance. The number after 'W' represents the oil's stability at high temperatures (i.e., its tendency to thin out), with a higher number indicating better high-temperature stability.
From a performance perspective, after switching to 0W20 oil, I feel the engine starts much smoother in cold weather. When using 5W20 before, the car would struggle a bit at -20°C, but now it starts right up. In fact, the high-temperature performance of both oils is similar, both suitable for daily driving, but 0W20 has better low-temperature fluidity, reducing piston wear. Fuel consumption might slightly decrease because it flows faster and has less resistance. After driving several cars, I found this particularly useful in northern winters. However, you need to ensure there are no other issues with the vehicle, such as a properly functioning oil pump. In short, this change can extend engine life and provide more peace of mind, especially if you live in consistently cold areas.
After switching to 0W20 oil, I noticed a slight improvement in fuel consumption during daily driving. This is mainly due to better low-temperature fluidity and reduced engine startup resistance, leading to slightly higher fuel efficiency. The difference is negligible in high-temperature conditions, but if you frequently drive short distances in the city, reduced carbon buildup may be more noticeable. However, oil costs may increase by 10-20%, but long-term savings can compensate. Don't just focus on brands; regular oil pressure checks are recommended. During long-distance driving, I felt the engine runs smoother with improved overall driving experience, but don't expect dramatic changes—it's just minor refinement.
