Should the Verna use 20 or 30 engine oil?

[GarrettFitz]

The Verna can use fully synthetic 20 engine oil. Engine oil change interval: Most engine oils abroad are changed at 10,000 kilometers, while domestic manufacturers in China generally advance the change interval to 7,500 kilometers or even 5,000 kilometers due to poor road conditions. However, in reality, as long as the oil color is clear, the oil level is not below the marked minimum level, and there are no special circumstances, the engine oil does not need to be changed so frequently. Functions of engine oil: Cooling and temperature reduction, sealing and leak prevention, cleaning, shock absorption and buffering, lubrication to reduce wear, rust and corrosion prevention, and component protection. Engine oil, also known as engine lubricating oil, is composed of base oil and additives. Base oil is the main component of lubricating oil, determining its basic properties, while additives can compensate for and improve the shortcomings of base oil performance.