Engine Oil: Description and Operation

SELECTION OF LUBRICANTS
ENGINE OIL
Recommended API classification : SG OR SG/CD
Recommended SAE viscosity grades :
For best performance and for maximum protection of all engines for all types of operation, select only those lubricants which:
1. Conform to the requirements of API classification.
2. Have proper SAE grade number for expected temperature range.
Lubricants which do not have both a SAE grade number and an API service classification on the container should not be used.