What type of engine oil is suitable for the Roewe 350?

[Harris]

Roewe 350's original factory engine oil specification is 5W-30. If owners choose to purchase and replace the oil themselves, they must ensure that the oil specification meets or exceeds the "original factory oil" standard. 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 latter 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 in high-temperature conditions. The steps for changing the engine oil in a Roewe 350 are 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 oil drain plug and place an oil pan underneath to catch the old oil. Drain until no more oil flows out. Start the engine and let it run for 30 seconds to allow oil in the main oil passages to drain. Use a specialized wrench to remove the oil filter. Apply a thin layer of new oil to the gasket of the new oil filter and hand-tighten it clockwise. Add new engine oil through the oil filler cap on the engine valve cover. Typically, fill about three-quarters of a standard oil container. Start the engine and let it run for 5 minutes. Check for oil 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.