What Oil is Used for Wet Dual-Clutch Transmissions?
3 Answers
Wet dual-clutch transmissions use hydraulic oil. Below are some precautions regarding vehicle refueling: Avoid overfilling: Overfilling the fuel tank can easily block the vent hole. Once the vent hole is blocked, the pressure inside the tank will drop below normal levels, leading to poor fuel supply or even a complete lack of fuel. Overfilling also increases the vehicle's weight, thereby increasing fuel consumption. Additionally, gasoline can deteriorate, posing safety risks. Try to avoid waiting for the low-fuel warning before refueling: While driving, always monitor the fuel gauge. When the indicator shows only a quarter of the fuel remaining, it's time to refuel. If the tank remains empty for too long, the temperature difference between the inside and outside can cause moisture to form inside the tank, leading to corrosion, degraded fuel quality, and increased engine strain.
In my daily driving of a wet dual-clutch transmission vehicle, I've found that using specialized dual-clutch transmission fluid is essential, as regular automatic transmission fluid simply won't work. This fluid is designed with low viscosity and high stability to lubricate the clutch and maintain friction control. The wet clutch operates submerged in oil, which also serves to cool the system and prevent overheating. During each maintenance session, I emphasize checking the manual for specified specifications, such as Volkswagen's G-052 182, with a replacement interval of approximately every 40,000 to 60,000 kilometers. DIY oil changes are quite challenging, as both oil level checks and replacements should be performed by professionals. Using the wrong fluid can cause jerky shifts or premature wear, leading to expensive repairs. Regular maintenance enhances shifting smoothness and fuel efficiency. Neglecting it can cause failure rates to skyrocket and significantly degrade the driving experience.
I've researched automotive transmission systems, and the oil for wet dual-clutch transmissions isn't just any oil—it must be specialized DCTF oil. The oil needs to provide controlled friction coefficients to prevent clutch slippage while also dissipating heat. Brands like Castrol Transmax DCT or Liqui Moly have excellent formulations that meet API GL-4 standards. Using the wrong AT oil can lead to abnormal noises or sticking. When replacing the oil, note that temperature affects performance; changing it when the car is cold yields more accurate results. Additional knowledge: When oil quality degrades, shift responsiveness slows down. Regularly check the oil color—if it appears dark or cloudy, replace it immediately. This helps extend transmission life and reduces unexpected failures.
