The most commonly used original equipment manufacturer (OEM) oil specification for the Excelle is 5W-30, specifically Mobil 1 full synthetic oil. If you wish to change the oil during later maintenance, you can choose from brands like Mobil, SRS, Shell, and Castrol. The official Excelle manual recommends oil specifications of 5W-20, 5W-30, or 5W-40. The viscosity of engine oil changes with temperature, so it's crucial to pay attention 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 oil's kinematic viscosity at 100°C. A higher number means the oil can maintain its viscosity index better at high temperatures, which can also be understood as providing better lubrication performance under high-temperature conditions. The method for changing the oil in an Excelle is as follows: Wait for the engine temperature to cool down, allowing the oil to drain 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 until it stops flowing. Start the engine and let it run for about 30 seconds to allow the oil in the main oil passages to drain out. Use a specialized wrench to remove the oil filter. Apply a small amount of new oil to the gasket of the new oil filter and hand-tighten it clockwise. Add the new oil through the oil filler cap on the engine's valve cover. Typically, fill up to three-quarters of the oil bottle. Start the engine and let it run for 5 minutes, checking for any leaks around the oil drain plug and oil filter. If leaks are found, perform necessary repairs. After turning off the engine, pull out the oil dipstick to check that the oil level is within the standard range.
