The EA888 engine uses two types of oil: 5W40 and 5W30. The 5W40 has a lower viscosity and offers better high-temperature protection. For later maintenance and oil changes, you can choose brands like Castrol or Mobil. The official manual recommends 5W-40 and 5W30. Oil viscosity changes with temperature, so it's important 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, ensuring smoother cold starts for the car. The second number represents the oil's kinematic viscosity at 100°C. A higher number indicates better viscosity retention at high temperatures, meaning better lubrication performance under high-temperature conditions. The method for changing the oil in the EA888 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 30 seconds to drain any remaining oil from the main oil passages. Use a specialized wrench to remove the oil filter. Apply oil to the seal of the new oil filter and hand-tighten it clockwise. Add the new oil through the engine valve cover filler port, typically filling about three-quarters of the oil container. Start the engine and let it run for 5 minutes, checking for leaks around the oil drain plug and oil filter. If leaks are found, perform necessary repairs. After stopping the engine, pull out the dipstick to check that the oil level is within the standard range.
