What type of oil is suitable for the Changan CS55?
3 Answers
The original oil specification for the Changan CS55 is SL-grade 5W-30 mineral oil. This oil is economical and reliable, having undergone precise matching and rigorous validation by the manufacturer, ensuring normal usage and engine longevity. Additionally, Shell-branded oil is recommended for the Changan CS55, with an oil capacity of approximately 4 liters. The viscosity of engine oil changes with temperature, so special attention should 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, resulting in smoother cold starts for the vehicle. The second number represents the kinematic viscosity of the oil at 100°C. A higher value means the oil can maintain its viscosity index better at high temperatures, which can also be understood as providing superior lubrication performance under high-temperature conditions. The method for changing the oil in the Changan CS55 is as follows: Wait for the engine temperature to cool down, allowing the oil to flow back into the oil pan. Use a wrench to loosen the drain plug and place an oil pan underneath to catch the old oil until it stops flowing. Start the engine and let it run for 30 seconds to allow the oil in the main oil passages to drain out. Use a specialized wrench to remove the oil filter. Apply oil to the seal of the new oil filter and tighten it clockwise by hand. Add new oil through the engine valve cover filler port, typically filling up to three-quarters of a 4-liter oil container. Start the engine and let it run for 5 minutes, checking for leaks around the drain plug and oil filter. If leaks are found, perform necessary repairs. After stopping the engine, pull out the dipstick to ensure the oil level is within the standard range.
Hey there, fellow Changan CS55 owner, let me share some tips. For engine oil, I recommend using full synthetic SAE 5W-30. This grade ensures smooth starts even in sub-zero winter temperatures and maintains proper viscosity in summer heat, preventing carbon buildup. I personally use Mobil 1 or Shell products—great value for money. Change it every 8,000 km or so to extend engine life by years. Avoid mineral oils; they’re cheap but require frequent changes, costing more in the long run. Check your owner’s manual—it clearly states 5W-30 as the factory recommendation, especially for China’s distinct four-season climate. Quick tip: When getting an oil change, ask the mechanic to verify the oil grade to avoid piston damage from mismatched oil. Stick to regular oil changes—your car will run smoother, save fuel, and give you peace of mind.
From a technical perspective on engine oil, the Changan CS55 engine is best suited for SAE 5W-30 viscosity. The 'W' stands for Winter performance, where the '5' ensures quick flow in extreme cold, and the '30' provides strong protection at high temperatures, ensuring proper internal engine lubrication. Prioritize fully synthetic oils like Castrol Edge, with API SN or newer SP standards to reduce friction and wear. Oil that's too thin, such as 0W, may cause leaks, while oil that's too thick, like 10W-40, increases resistance and fuel consumption. Using the wrong oil can also accelerate engine aging. Check the oil label to ensure OEM certification, and simply use the dipstick to regularly monitor the oil level—top it up if it's low. For regions with significant seasonal changes, consider 5W for sub-zero temperatures in winter, while maintaining the 30 viscosity in summer. Change the oil every 5,000 to 10,000 kilometers to keep the engine healthy and prevent breakdowns.
