10 MINUTE TECH ENGINE OILS
Q. WHAT DOES ENGINE OIL DO?
A. Although the main task of engine oil is to lubricate things, it also has many more jobs: it cools the engine components; it removes deposits and transports them to the oil filter; it seals the piston rings; and it protects the metal surfaces from corrosion.
Q. WHAT DO THE DIFFERENT GRADES OF OIL MEAN?
A. There are many different grades of oil available, and the most common measure to differentiate them still is the viscosity (e.g. 5W-30). However, this is a little outdated these days. In the past, viscosity was the defining factor to
