What kind of oil should be used for BMW 316?

[FrankDella]

BMW 316 uses 5W30 engine oil. Lubrication and wear reduction: There is rapid relative sliding between the piston and cylinder, as well as between the main shaft and bearing shells. To prevent excessive wear of parts, an oil film needs to be established between the two sliding surfaces. A sufficiently thick oil film separates the surfaces of relatively sliding parts, thereby achieving the purpose of reducing wear. Cooling: Engine oil can bring heat back to the oil tank and then dissipate it into the air, helping the radiator to cool the engine. Cleaning: Good engine oil can circulate carbon deposits, sludge, and worn metal particles from engine parts back to the oil tank. Through the flow of lubricating oil, it washes away dirt generated on the working surfaces of the parts. Sealing and leakage prevention: Engine oil can form a sealing ring between the piston rings and the piston, reducing gas leakage and preventing external contaminants from entering.