What model and specification of engine oil should be used for Audi A7?

[JasperFitz]

Audi A7 can use Shell or Mobil engine oil, but it is not recommended to frequently switch between different brands of engine oil. Extended content: The functions of engine oil for Audi A7 are as follows: 1. Cleaning: High-quality engine oil can carry carbon deposits, sludge, and worn metal particles from engine components back to the oil tank through circulation, washing away contaminants generated on the working surfaces of the parts via the flow of the lubricating oil. 2. Sealing and leak prevention: Engine oil can form a sealing ring between the piston rings and pistons, reducing gas leakage and preventing external contaminants from entering. 3. Rust and corrosion prevention: Lubricating oil can adhere to the surfaces of parts, preventing contact with water, air, acidic substances, and harmful gases. 4. Shock absorption and cushioning: When the pressure in the engine cylinder rises sharply, suddenly increasing the load on the pistons, piston rings, connecting rods, and crankshaft bearings, this load is transmitted and lubricated through the bearings, cushioning the impact load.