Which brand of engine oil is suitable for the naturally aspirated Lavida?

[HannahLee]

The naturally aspirated Lavida model uses Shell 5W-30 semi-synthetic engine oil. For later maintenance and oil changes, you can choose engine oils from brands such as Mobil, Castrol, Total, and Great Wall. Different displacement versions of the Lavida have different recommended oil specifications in their manuals. The Lavida 1.6 uses SJ-grade mineral oils with specifications of 0W30, 5W30, or 5W40, or higher-grade oils. The Lavida 1.4T uses SL-grade semi-synthetic oil with a specification of 5W40 or higher-grade oils. The Lavida 1.5 naturally aspirated version uses SJ-grade mineral oil with a specification of 5W40. 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, with 5W representing the ability to 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 latter 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 better lubrication performance under high-temperature conditions. The method for changing the engine oil in a Lavida is as follows: Wait for the engine temperature to drop, 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 until it stops flowing. Start the engine for about 30 seconds to allow the oil in the main oil passage to drain out; Use a specialized wrench to remove the oil filter; Apply engine oil to the oil seal of the new oil filter and tighten it clockwise by hand; Add the new engine oil through the oil filler cap on the engine valve cover, typically filling about three-quarters of the oil container; 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 stopping the engine, pull out the oil dipstick to ensure the engine oil level is within the standard range.