Which brand of fully synthetic engine oil is good?
3 Answers
Fully synthetic engine oils from Mobil and Castrol are good brands. Among domestic engine oils, brands like Jiahua, Kunlun, and Great Wall synthetic oils are also quite well-known. The functions of engine oil are: 1. To reduce friction and high temperatures; 2. To minimize gas leakage and prevent external pollutants; 3. To prevent contact between water, air, acidic harmful gases, and engine parts; 4. To cushion the pressure rise in the engine cylinder port; 5. To clean dirt generated on the working surfaces of parts. The method to check engine oil is: 1. Park the vehicle on a level surface; 2. Pull out the dipstick after the vehicle has been parked for 10 minutes; 3. Hold the dipstick perpendicular to the ground to check the oil level.
I've personally tested the Motul 300V series many times on the track, and its high-RPM protection is truly impeccable. It works particularly well with Japanese performance cars like Subaru and Mitsubishi - even cold starts in winter sound smoother. Just be aware this oil degrades relatively quickly, requiring changes every 5,000-6,000 km. Many modders love pairing it with performance clutches as it reportedly reduces thermal degradation. The new ESP formula offers better cleaning performance and is GPF-compatible. If you frequently drive aggressively or tackle mountain roads, it's definitely worth trying, though it might be overkill for daily commuter cars.
For family cars, I highly recommend Mobil 1, especially the golden can version. My old car has been running for eight years with an engine as good as new, and it starts smoothly even in cold weather. Last time when the mechanic opened up the engine, he was surprised by how clean it was inside. The most impressive thing is the oil change interval - it can easily handle 7,000-8,000 kilometers under Chinese road conditions. During promotions, you can get a 4-liter pack for just over 300 yuan. I have a Didi driver friend who's clocked 500,000 kilometers without major repairs thanks to this oil. Just remember not to buy from unknown sources to avoid fakes - the official flagship store often runs buy-one-get-one-free promotions.
