What Type of Oil Should Be Used for China VI Diesel Vehicles?
3 Answers
China VI diesel vehicles use engine oil of the model CK-4 15W-40. If you plan to change the oil during later maintenance, it is essential to select oil that meets the CK-4 standard. The viscosity of engine oil changes with temperature, so special attention must be paid to its performance under both low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity—5W means it can withstand temperatures as low as -30°C. The smaller this number, the better the low-temperature fluidity, ensuring smoother cold starts for the vehicle. The second number represents the oil's kinematic viscosity at 100°C. A higher value indicates better viscosity retention under high temperatures, which can also be understood as superior lubrication performance under high-temperature conditions. The method for changing the oil in China VI diesel vehicles is as follows: Wait for the engine temperature to drop, allowing the oil to flow back into the oil pan. Use a wrench to loosen the oil drain plug and collect the old oil in a container until no more oil flows out. Start the engine and let it run for 30 seconds to allow the oil in the main oil passage to drain. Remove the oil filter using a specialized wrench. Apply oil to the oil seal of the new oil filter and tighten it clockwise by hand. Pour the new oil into the engine's valve cover oil filler port. Generally, fill about three-quarters of a standard oil container. Start the engine and let it run for 5 minutes, checking for leaks around the oil drain plug and oil filter. If leaks are found, perform necessary repairs. After stopping the engine, pull out the oil dipstick to ensure the oil level is within the standard range.
I've been driving a China VI diesel vehicle for several years, and it truly requires specific engine oil to protect those complex emission systems. Recommended specifications like API CK-4 or FA-4, and ACEA C3 are quite common. These oils have low ash content and strictly controlled sulfur levels, which prevent diesel particulate filter (DPF) clogging—otherwise, you'll experience power loss and face expensive repairs. Personally, I prefer using Shell Rimula or Mobil Delvac series, as they're specifically designed for eco-friendly vehicles. Always refer to the owner's manual during maintenance and avoid randomly switching oils—some brands falsely label their products, which can be problematic. Regularly check oil levels and filters to keep the engine running smoothly. This makes driving much more reassuring, especially during long trips with fewer risks.
As someone who cares deeply about the environment, the choice of engine oil for China VI diesel vehicles directly impacts air cleanliness. Specifications like CK-4 are crucial—they reduce ash emissions, help DPF filters clean exhaust more effectively, and comply with China VI standards to lower NOx and particulate matter. I've used Kunlun Tianrun or Great Wall lubricants, which offer stable performance and meet ACEAC standards. Don't underestimate the importance of oil changes; low-quality oil can accelerate system failures, leading to higher emissions or even fines. Make it a habit to check oil specifications and choose low-pollution brands—your vehicle will last longer and save fuel. Driving with such awareness makes you feel like you're contributing more, with peace of mind, fewer repair costs, and a healthier planet.
