| PSI Specifications (343.1981) Pakistan Standards Institute | | | | | | | | | | | | |
| Lubricating Oil for Internal Combustion Engines | |
| Characteristics of the products | | Method Followed by PSI | PSI Specifications (343.1981) Pakistan Standards Institute |
| S.N | |
| SAE Grade | SAE Grade | SAE Grade | SAE Grade | SAE Grade | SAE Grade | Multi-Grade | Multi-Grade | Multi-Grade |
| 10W | 20W | 20 | 30 | 40 | 50 | 10W-30 | 20W-40 | 20W-50 |
| 1 | Flash Point COC, Degree C | Min. | ASTM D-92 | 177 | 201 | 201 | 201 | 201 | 201 | 177 | 201 | 201 |
| 2:00 AM | Kinematic Viscosity | Min. | ASTM D-445 | 4.1 | 5.6 | 5.6 | 9.3 | 12.5 | 16.3 | 9.3 | 12.5 | 16.3 |
| 2 b | Kinematic Viscosity at 100o C, cST | Max. | | 0 | 0 | 9.3 | 12.5 | 16.3 | 21.9 | 12.5 | 16.3 | 21.9 |
| 3:00 AM | Kinematic Viscosity | Min. | ASTM D-445 | 1300 | 2600 | 0 | 0 | 0 | 0 | 1,300* | 2,600* | 2,600* |
| 3 b | Kinematic Viscosity at 18o C, cST | Max. | | 2600 | 10,500 | 0 | 0 | 0 | 0 | 2,600.00 | 10,500.00 | 10,500.00 |
| 4 | Pour Point oC | Max. | ASTM D-97 | -21 | -21 | -6 | -6 | -6 | -6 | -9 | -9 | -9 |
| 5 | Viscosity Index | Min. | ASTM D-2270 | 90 | 90 | 85 | 85 | 85 | 85 | 120 | 120 | 120 |
| 6 | Copper Strip Corrosion, 3 Hours at 100oC | Max. | ASTM D-130 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 7 | Performance test** | | | As applicable for individual Grade |
| * | Applicable after incorporation of sufficient quantity of pour point depressant which could reduce its pour point to -21oC |
| ** | Performance tests form part of specifications |
