
Petrol engines, naturally aspirated and supercharged diesel engines, power generating sets etc, operating under moderate duty conditions.
Always change filter when changing engine oil. Short trips; stop-and-go traffic; excessive dust or dirt-such conditions are very hard for engine oils and may lead to frequent oil changes.
| Characteristics | Test Methods | 15W40 | 15W50 |
| Kinematic Viscosity at 100°C cST | IS : 1448 : P-25 | 14-15.5 | 17-18.5 |
| Viscosity Index, Min. | IS : 1448 : P-56 | 135 | 135 |
| Flash Point COC, Min. | IS : 1448: P-69 | 225 | 225 |
| TBN gm KOH/gm | IS : 1448 P-86 | 10 | 10 |