| Heavy-Duty Diesel Engine Test Category
For API CG-4/CF/CF-2 |
| Requirements | Test Method | Properties | Unit | Limits |
| 1 Test | 2 Tests | 3 Tests |
| 1. LABORATORY TESTS |
| 1.1 Viscosity Grades |
| SAE J300 |
| Manufacturer specifies viscosity target within SAE J300 specification |
| 1.2 HEUI Air Entrainment Test(4) |
| Aeration, max | % volume | 10.0 | - | - |
| 1.3 Cummins Bench Corrosion Test(4) | ASTM D5968 | Copper increase, max | ppm | 20 | No MTAC(1)(2) |
| Lead increase, max | ppm | 60 |
| Tin increase, max | ppm | report |
| Copper corrosion rating,
max (D130) |
| 3 |
| 1.4 Foam Test(4) | ASTM D892 | Sequence I | mL | 10/0 max | No MTAC(1)(2) |
| Sequence II | mL | 20/0 max |
| Sequence III | mL | 10/0 max |
| 2. ENGINE TESTS FOR API CG-4 |
| 2.1 Mack T-8 | ASTM D5967 | Viscosity increase at 3.8% soot, max | cSt | 11.5 | 12.5 | 13.0 |
| Filter plugging, differential pressure, max | kPa/(psi) | 138(20) | 138(20) | 138(20) |
| Oil consumption, max | g/kW-h (lb/bhp.h) | 0.304(0.0005) | 0.304(0.0005) | 0.304(0.0005) |
| 2.2 Caterpillar 1N |
| Weighted total demerits, max |
| 286.2 | 311.7 | 323.0 |
| Top groove fill, max | % volume | 20 | 23 | 25 |
| Top land heavy carbon, max | % | 3 | 4 | 5 |
| Oil consumption, max | g/kW-h | 0.5 | 0.5 | 0.5 |
| Scuffing, piston-rings-liner
Number of tests allowed |
| none | none | none |
| Stuck rings |
| none | none | none |
| 2.3 Roller Follower Wear Test | ASTM D5966 | Wear, max | µm (mils) | 11.4 (0.45) | 12.4 (0.49) | 12.7 (0.50) |
| 2.4 Sequence IIIE | ASTM D5533 | Hours to 375% viscosity increase, min | hours | 67.5 | 65.1 | 64.0 |
| 2.5 CRC L-38 | ASTM D5119 | Bearing weight loss, max | mg | 43.7 | 48.1 | 50.0 |
|
|
| Used oil viscosity, cSt greater than SAE J300 lower limit for grade, min | cSt | 0.5 | 0.5 | 0.5 |
| 3. ENGINE TESTS FOR API CF/CF-2 |
| 3.1 Caterpillar 1MPC | RR:D02-1320 | Weighted total demerits, max | % volume
mm | 240 | MTAC applies(2) |
| Top groove fill, max | 70 |
| Ring side clearance loss, max | 0.013 |
| Piston ring sticking | none |
| Piston ring and liner scuffing | none |
| Weighted total demerits,
CF-2 max | 100 |
| 3.2 CRC L-38 | ASTM D5119 | Bearing weight loss, max | mg | 43.7 | 48.1 | 50.0 |
| 3.3 Detroit Diesel 6V92TA(3) | ASTM D5862 | Cylinder liner scuffing area, max | % | 45 | 48 | 50 |
| Average fire ring face distress | demerits | 0.23 | 0.24 | 0.26 |
| Average 2 & 3 ring face distress | demerits | 0.20 | 0.21 | 0.22 |
| Broken rings |
| none | none | none |
| Cylinder liner port plugging area |
|
|
|
|
| Average, max | % | 2 | 2 | 2 |
| Single cylinder, max | % | 5 | 5 | 5 |
| (1) Not an ACC Test.
(2) MTAC is a statistical method for treating engine test results. Consult your sales representative for further information.
(3) This test is not required for API CF.
(4) This test is not required for CF/CF-2. |
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