Can 10W/30 be used in summer?
2 Answers
10W/30 engine oil can be used in summer, but it is not recommended for vehicles that frequently engage in long-distance high-speed driving. If the engine is to be continuously operated for long-distance high-speed driving, it is advisable to use engine oil with a higher viscosity grade to avoid engine damage. Here is additional information: 1. The number before W: The number before W refers to the viscosity of the engine oil at low temperatures. The smaller the number, the better the low-temperature fluidity of the oil, and the better the protection for the engine during cold starts. 2. The number after W: The number after W indicates the viscosity grade of the oil at 100°C. The larger the number, the higher the viscosity grade and the better the protective effect.
As someone who frequently commutes by car, I find 10W-30 oil perfectly usable in summer. Under normal temperatures ranging from 20 to 35 degrees Celsius, it performs without issues, providing stable engine protection. Unless you live in a desert area where temperatures soar above 40 degrees, causing the oil to thin slightly and affect lubrication, it's generally fine. Even when running the AC during long summer drives, I've never experienced oil leaks or abnormalities. The key is to follow the owner’s manual—if the manufacturer recommends it, stick to that instead of making uninformed guesses that could cause problems. Don’t delay oil change intervals too long, as high temperatures can lead to faster impurity buildup. Regularly checking oil levels ensures safety and peace of mind. It’s also cost-effective for fuel efficiency, so why not go for it?
