What kind of engine oil is best for the Elantra?

[VanJayden]

The Elantra is recommended to use the original Shell HELIX engine oil with the specification SM5W-30. Here is the relevant introduction about engine oil: 1. Reduce wear: There is rapid relative sliding between the piston and cylinder, as well as between the main shaft and bearing. To prevent excessive wear of parts, it is necessary to establish an oil film of sufficient thickness between the two sliding surfaces to separate the relatively sliding parts, thereby reducing wear and extending mechanical life. 2. Cooling: Engine oil can help the radiator cool the engine and expel heat from the engine. 3. Sealing and leakage prevention: Engine oil can form a sealing ring between the piston ring and piston, reducing gas leakage and the entry of pollutants.