What Oil Viscosity Grade Should Be Used in Summer?
4 Answers
In summer, it is recommended to use engine oil with viscosity grades of 10W40 or 10W30. While ensuring proper lubrication, choose oil with the smallest possible viscosity based on the temperature range during usage, engine temperature, and actual vehicle condition. The number before the W in oil grade represents cold start performance - the smaller the number, the better the oil's low-temperature fluidity. The number after W indicates the oil's kinematic viscosity - the higher the value, the greater the viscosity. Engine oil consists of base oil and additives, serving the following functions: 1. Reducing friction and high temperatures; 2. Cooling and temperature reduction; 3. Cleaning; 4. Shock absorption; 5. Rust and corrosion prevention.
I think choosing the right engine oil viscosity is crucial in summer due to high temperatures that can thin out the oil. It's better to go with higher viscosity options. With a decade of driving experience, I usually recommend 10W-30 or 10W-40 – these maintain good viscosity in heat and protect the engine from wear. Avoid thinner oils like 5W-20, as they might make the car feel sluggish in summer heat. Since switching to 10W-40 two years ago, my engine runs quieter with only a slight increase in fuel consumption. Also, make it a habit to regularly check oil level and color – if it appears cloudy or contains debris, change it early. After all, the engine is the heart of the car, and safety comes first.
From a professional perspective, it's advisable to choose higher viscosity engine oil for summer, such as 10W-40 or 15W-40, as these grades experience slower viscosity breakdown at high temperatures, ensuring optimal lubrication. Full synthetic oil is even more ideal due to its superior high-temperature resistance, which extends engine lifespan. I've observed that many customers' vehicles consume oil faster during summer, and higher viscosity formulations can help prevent this issue. It's also crucial to adhere to proper oil change intervals—consulting the owner's manual provides the safest guidance. Worth mentioning, while cold starts might be slightly more difficult, the number after the "W" is critical, with summer grades preferably being 40 or above.
I always pay attention to the impact of engine oil on fuel consumption and environmental protection. Choosing a grade like 10W-30 in high summer temperatures can reduce engine friction and help save fuel. When the air conditioning is used frequently, the engine load increases, so selecting the right oil is crucial for peace of mind. Using low-ash, energy-saving engine oil is more environmentally friendly, like certain certified brands that protect air quality. Avoid using oil with too high a viscosity, as it can increase fuel consumption. Regular inspection and replacement are also essential, as engine oil ages faster in the hot summer. This approach saves costs and protects the planet.
