
Yuan's transmission uses 75W-90 transmission oil. Here is relevant information: 1. The refill quantity is generally around 2L. Transmission oil is a lubricant that maintains the cleanliness of the gear system, ensuring proper transmission operation and extending the lifespan of the drivetrain components. 2. Manual transmissions primarily consist of gears and shafts, achieving speed and torque variation through different gear combinations; whereas automatic transmissions (AT) are composed of torque converters, planetary gearsets, and hydraulic control systems, utilizing hydraulic power transfer and gear combinations to achieve speed and torque variation.

















As a long-term owner of the Yuan, I've gained quite some experience in choosing transmission fluid. Our car is basically automatic, so the type of fluid requires special attention. For my car, the owner's manual recommends using BYD's original CVT transmission fluid or fluids that meet the ATF SP-IV specification to properly protect the transmission and prevent overheating. After changing the fluid twice myself, I've noticed much smoother operation and avoided a lot of trouble. Using the wrong transmission fluid can cause jerking or even damage, so I recommend buying genuine products from authorized 4S shops rather than going for cheap, unguaranteed options online. Regular maintenance is crucial and can extend the lifespan.

As a new owner of a Yuan (my first car), I was quite confused at first. When selecting transmission fluid, I checked the manual which recommends using Dexron VI standard or BYD's own specialized fluid, emphasizing not to mix types. I once tried changing the fluid myself but bought the wrong one, resulting in noticeable jerking while driving. Later, customer service informed me that the fluid type varies by model year—the 2019 version might differ from previous generations. My advice to new owners: have the fluid checked and changed at an authorized service center for hassle-free and safe maintenance.

When using the Yuan to pick up and drop off children, safety comes first. The transmission fluid specification must be correct. Based on my experience, the manual specifies using ATF+4 or similar specification fluids. Every year during maintenance, I specifically choose authorized dealerships because they use matched fluids, which are less prone to issues. Using the wrong fluid can affect driving smoothness, especially causing hesitation when climbing hills, which would be troublesome.

After driving for so many years, don't be careless about transmission fluid selection. For Yuan's automatic transmission, prioritize genuine fluid or replacements that meet the SP-III specification. Different road conditions affect fluid lifespan—for example, frequent city traffic congestion accelerates deterioration, requiring more frequent checks and changes. It's recommended to change it every two years or 40,000 kilometers.

I've always been curious about car and have researched the transmission fluid for the BYD Yuan. The manual specifies using Dexron standard or specialized oil types to ensure lubrication. Using the wrong transmission fluid model may trigger fault codes and increase repair costs. Checking the fluid level and color during each maintenance session can help identify potential issues early.


