Table 1: Lubricants selected for the study.

Sl. numberLubricant codeSAE gradeBase oilApplication

1SAE-40MineralDiesel engine
2SAE20W-50MineralDiesel/gasoline engine
3SAE20W-50MineralGasoline engine
4SAE5W-40SyntheticDiesel/gasoline engine
5SAE5W-40SyntheticDiesel/gasoline engine