What kind of engine oil should be used for the Changan CS55 turbocharged engine?
3 Answers
Changan CS55 turbocharged engine requires the use of 5W-40 engine oil. Engine oil models are divided into three categories: summer, winter, and all-season oils. Winter oil grades are: 0W, 5W, 10W, 15W, 20W, 25W; summer oil grades are: 20, 30, 40, 50; all-season oil grades are: 5W/20, 5W/30, etc. The numbers following the oil grade indicate its viscosity specification. For example, in "15W-40, 5W-40," "W" stands for Winter. The smaller the number before "W," the better the oil's low-temperature fluidity, indicating a lower usable environmental temperature and better protection for the engine during cold starts. For instance, 5W can withstand external temperatures as low as -30°C, while 20W can withstand -15°C. Oil grades are represented by a combination of two letters. The "S" series represents oils for gasoline engines, with specifications generally ranging from SA to SN (in alphabetical order, excluding SI). Each subsequent letter indicates better performance than the previous one, with more additives to protect the engine. The later the letter, the higher the quality grade, with most international brands offering oils above SF grade. The "C" series represents oils for diesel engines. If both "S" and "C" letters are present, it indicates that the oil is suitable for both gasoline and diesel engines.
I've been driving my Changan CS55 turbocharged version for several years, always using fully synthetic 5W-30 engine oil, and the performance has been excellent. Turbocharged engines run at higher temperatures, and conventional oils can't handle it, easily causing component wear, so I stick to synthetic oil for protection. As for brands, I've tried both Shell and Mobil, and they perform similarly well. The key is not to go for cheap, low-end products to avoid turbo damage or increased fuel consumption. For regular maintenance, I change the oil every 8,000 kilometers. It's also convenient in winter, as 5W has strong low-temperature fluidity, so I don’t worry about cold-start issues. I remember once using semi-synthetic oil during a service, and the engine noise noticeably increased. Switching back to full synthetic made it smooth again. A reminder to new drivers: always check the manual for recommendations and avoid experimenting with other viscosities.
To protect a turbocharged engine, engine oil plays a crucial role. I use 5W-30 full synthetic oil in my Changan CS55, and the results are reliable. Turbos operate at high temperatures, requiring oil with excellent thermal stability and cleaning properties—synthetic oil excels in this regard. The recommended oil change interval is 7,000 to 10,000 kilometers; waiting too long leads to rapid oil degradation. Personally, I prefer reputable brands like Castrol for their stable quality. Don’t just focus on price when choosing—low-viscosity oil is unsuitable as it can cause insufficient lubrication and turbo wear. In colder climates, 5W oil ensures quicker startup and faster protection. Regular maintenance is key; neglecting oil issues can shorten engine life and increase fuel consumption. A well-maintained turbo keeps the car running smoothly.
