Which brand is Shell?

Shell is a Dutch brand. Royal-Dutch-U002f Shell-Group-of-Companies also translated "Shell" into the world's largest oil company, headquartered in The Hague, the Netherlands and London, England, which was formed by the merger of Royal Dutch Oil Company and British Shell Company. The following is the function of engine oil: 1. Reduce friction: the oil film with sufficient thickness will separate the surfaces of relatively sliding parts to achieve the effect of reducing wear. 2. Sealing function: the engine oil can form a sealing ring between the piston ring and the piston, reducing gas leakage and preventing external pollutants from entering. 3. Rust prevention: Lubricating oil can be adsorbed on the surface of parts to prevent water, air, acidic substances and harmful gases from contacting with parts. 4. Cushioning effect: When the engine cylinder pressure rises sharply, the load on the piston, piston plate, connecting rod and crankshaft bearing is very heavy, which plays a buffering role through the transmission lubrication of the bearing. 5. Cleaning function: Good engine oil can circulate carbides, sludge and worn metal particles on engine parts and bring them back to the oil tank, and the dirt generated on the working surface of the parts can be washed away through the flow of lubricating oil.