Description
Majestic 15W-40 Synthetic Blend Heavy-Duty Motor Oil in a 2-gallon jug is API CK-4 / SN licensed engine oil formulated for modern heavy-duty diesel and gasoline engines. The 15W-40 viscosity grade and CK-4 service category make it a current-spec replacement for CJ-4, CI-4 PLUS, CI-4, and CH-4 diesel oils, including engines with EGR, DPF, SCR, and DOC aftertreatment systems running on ultra-low-sulfur diesel.
Specifications
| Manufacturer | Majestic Lubricants |
|---|---|
| Product | 15W-40 Synthetic Blend Heavy-Duty Motor Oil |
| SAE Viscosity Grade | 15W-40 |
| API Service Category | API CK-4 / SN |
| Backward Compatibility | API CJ-4, CI-4 PLUS, CI-4, CH-4 |
| Base Stock | Synthetic Blend (paraffinic Group II + synthetic) |
| Container Size | 2 Gallon Jug |
Applications
API CK-4 15W-40 is the current service-fill grade for most on-highway and off-highway heavy-duty diesel engines, including:
- Cummins ISX, ISM, ISL, ISB, X12, X15 (consult OEM service interval)
- Detroit DD13, DD15, DD16, and Series 60
- Caterpillar C7, C9, C13, C15, 3406E, ACERT and on-highway C-series
- Mack MP7, MP8, E7
- Volvo D11, D13, D16
- Paccar MX-11, MX-13
- Navistar / International MaxxForce, DT466, DT570
- Ford 6.7L Power Stroke, GM Duramax 6.6L, Dodge/RAM Cummins 5.9L & 6.7L
- Stationary diesel gensets, agricultural and construction equipment
Always consult your engine manufacturer’s owner manual for the recommended oil grade, drain interval, and approval list before service. CK-4 oils are backward-compatible with earlier API service categories but do not replace CJ-4 FA-4 oils where a fuel-economy FA-4 oil is specifically required.