What is the difference between 10w and 5w engine oil?
3 Answers
The difference between 10w and 5w engine oil lies in their low-temperature viscosity, maximum applicable temperature, and wear reduction effects. Here are the specific details: 1. Firstly, 10w engine oil has poorer low-temperature viscosity and fluidity compared to 5w engine oil, and it is suitable for higher minimum temperatures. 2. Secondly, 10w engine oil can withstand higher maximum temperatures than 5w engine oil, and it has a broader applicable temperature range. 3. The wear reduction effect of 10w engine oil on parts is better than that of 5w engine oil. The 'w' stands for 'winter,' and the smaller the number before 'w,' the lower the applicable temperature. When choosing engine oil for your car, it is essential to select the appropriate grade based on the temperature conditions of your location. In northern regions where temperatures are lower, a smaller number before 'w' is definitely better.
As an old-timer who's driven all my life, let me tell you the biggest difference between 10W and 5W oil lies in winter startup performance. That "5" in 5W means it maintains superb fluidity at -30°C low temperatures, allowing instant oil circulation to all engine parts upon startup - protecting components from excessive wear, reducing noise and slightly improving fuel efficiency. 10W oil works down to about -25°C, making cold starts slower in arctic regions. In summer or warmer areas, there's hardly any difference. Though 5W costs slightly more, it's worth it. Remember, engine protection outweighs cost savings - long-term 5W use can prevent major overhauls. Always check your vehicle manual first (no shortcuts!), then consider local climate: choose 5W for northern winters, 10W suffices for warmer southern regions.
I recently researched motor oil and found the difference between 10W and 5W quite practical. 5W has better low-temperature fluidity, providing faster engine lubrication during cold starts with slight fuel efficiency improvement; 10W flows slower but is more budget-friendly. The choice depends on your location – use 5W for engine protection in frigid regions, while 10W suffices in moderate climates. Never overlook brand reputation and oil quality, and always change oil promptly to prevent accelerated wear. My advice: first check your vehicle's recommended oil type online, then adjust seasonally – don't compromise performance by cutting corners.
