Can 15W-40 Engine Oil Be Used in Summer?
2 Answers
15W-40 is an all-season engine oil and can also be used in summer. Here are the classification methods for engine oil: 1. Winter oil grades are distinguished as: 0W, 5W, 10W, 15W, 20W, 25W. The symbol W stands for winter. The smaller the number before W, the lower the low-temperature viscosity, the better the low-temperature fluidity, and the lower the applicable minimum temperature. 2. Summer oil grades are distinguished as: 20, 30, 40, 50. The larger the number, the higher the viscosity and the higher the applicable maximum temperature. 3. All-season oil grades are distinguished as: 5W-20, 5W-30, 5W-40, 5W-50, 10W-20, 10W-30, 10W-40, 10W-50, 15W-20, 15W-30, 15W-40, 15W-50, 20W-20, 20W-30, 20W-40, 20W-50. The smaller the number representing the winter part, the lower the applicable minimum temperature. The larger the number representing the summer part, the higher the applicable maximum temperature.
Bro, 15W-40 oil is definitely suitable for summer use. I personally use it in my old car, and the engine runs smoothly and economically in hot weather. The 15W indicates good low-temperature fluidity, so you don't need to worry about cold starts in summer; the 40 means high-temperature viscosity is thick, protecting the engine from wear under heavy loads. I often drive long distances on highways in the south during summer, where engine temperatures are high, and the 40 viscosity maintains proper lubrication without causing a spike in fuel consumption. Remember to choose genuine oil and change it regularly, checking the oil level every 5,000 km or six months. Don’t cheap out and buy fake products. Before driving in high temperatures, check the dipstick to ensure the oil level is in the middle, preventing engine overheating and ensuring safety. Using this oil year-round is hassle-free, and adding a good air filter in summer boosts efficiency.
