What is a lubricating oil?
In general, it is a substance that reduces friction when placed between two surfaces with relative motion. There are lubricants with different grades and viscosities, although their functions have a lot of similarities as they:
- Reduce friction between two metal surfaces.
- Protect mechanical components from wear and corrosion.
- Clean and cool engines.
- Act as a sealant between the segments/pistons and jackets in order to prevent gas leaks from occurring inside the combustion chamber.