Great Wall lubricating oil is made in China, which is of medium level, and there is still a certain gap between it and foreign technology. However, I think Great Wall lubricants are not cheap, and the price/performance ratio is not very high. During the warranty period, I changed Great Wall lubricants at a 4S store, and later changed many others, including Mobil, AMSOIL Signature, GT engine oil, Volkswagen, etc. Now I use GT engine oil, which is German technology and has strong lifting power. When I was running on the viaduct, I was slightly overspeeding and it felt very comfortable to drive.