It looks like CI-4, with good grade, SL, which is common in gasoline engines and diesel engines. Actually, this is Petronas Lubricating Oil (Shandong) Co., Ltd., which is very bad. Don't buy it. It was a product of St. Mary's in the past, but its name was changed to Lan Zhi, and the price went up. It was not easy to sell at all. The treatment of salesmen is also very poor. He just went to free training for two weeks. This is a waste of people's time in the interview. The leader talks like a fart and doesn't care at all. Some old salesmen don't have a list for a month, and they are either fired or labeled in the workshop. I advise you not to go to this enterprise. If you go, don't listen to him and waste your time there.