What type of oil is suitable for the Changan CS55?
2 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.
