What is the difference between 10w and 5w engine oil?
3 Answers
Here are the differences between 10w and 5w engine oil: 1. 5W engine oil has better low-temperature fluidity than 10W, making it easier to start in cold environments. 2. 5W engine oil can be used at a minimum temperature of -30°C, while 10W can only be used at a minimum temperature of -25°C. 5W engine oil has stronger cold resistance than 10W. Here is some relevant information: 1. Engine oil lubricates, cleans, cools, seals, and reduces friction in the engine. It plays a significant role in reducing wear on engine components and extending their service life. 2. The oil filter is a component that filters the engine oil. Engine oil contains a certain amount of gum, impurities, water, and additives. During engine operation, metal particles generated by friction between components, impurities from the intake air, and oil oxides are all filtered by the oil filter. If the oil is not filtered and directly enters the oil circulation, it will adversely affect the engine's performance and lifespan. Many car owners often perform vehicle maintenance based on the mileage driven. However, the maintenance interval depends on the effective time or mileage of the engine oil and oil filter used. The effective periods of mineral oil, semi-synthetic oil, and full synthetic oil vary by brand and grade, so please follow the manufacturer's recommendations.
The main difference between 10W and 5W motor oils lies in their low-temperature flow performance. The smaller the number, the smoother the oil flows in cold temperatures. 5W oil has lower low-temperature viscosity, enabling better engine startup around -30°C, reducing friction and wear during cold starts. It's particularly suitable for those living in northern cold regions. I personally tried 5W during extreme cold, and the engine started faster and smoother. On the other hand, 10W is more suitable for slightly warmer areas, performing adequately around -25°C, but may struggle in extremely cold weather. Both may have similar high-temperature performance—the key is to match the manufacturer's specifications. When choosing, consider local climate: if winters frequently drop below freezing, opt for 5W to protect the engine; if you're in warmer southern regions, 10W is cost-effective and sufficient. This approach saves fuel and extends engine life—don't overlook this detail.
The 'W' in oil grades stands for 'winter'. The difference between 5W and 10W lies in their low-temperature fluidity. 5W maintains flow at lower temperatures, such as -35°C, ensuring engine lubrication and preventing metal friction during cold starts. 10W is slightly thicker in cold conditions and is suitable for environments above -25°C. Personally, I prefer changing oil according to the season: using 5W in the harsh northern winters ensures smooth cold starts, while 10W offers better cost-performance and convenience in spring, summer, or warmer regions. It's also important to match the oil grade to your car model—newer cars often recommend 5W for improved fuel efficiency, while older vehicles may run more stably with 10W. In short, flexible choices reduce maintenance headaches, and taking the time to understand your car's needs is always beneficial.
