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🛢️ Power your diesel with the ultimate synthetic edge—because your engine deserves the best.
ULTRA 1PLUS SAE 15W-40 Full Synthetic Diesel Engine Oil is API CK-4/SN certified, engineered for 2020+ on-highway trucks and Tier 4 non-road diesel engines. This 5-gallon pail delivers superior wear protection, exceptional shear stability, and thermal performance under extreme conditions. It reduces oil consumption, protects emission systems, and is compatible with mixed diesel and gasoline heavy-duty fleets, ensuring extended engine life and compliance with modern emission standards.





| ASIN | B08M9Q4QQY |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #156,925 in Automotive ( See Top 100 in Automotive ) #838 in Motor Oils |
| Brand Name | ULTRA 1PLUS |
| Compatible with Vehicle Type | Buses, Off-road / Industrial equipment, Truck, Vans |
| Container Type | Pail |
| Customer Reviews | 4.7 4.7 out of 5 stars (74) |
| Flash Point | 220 °C |
| Included Components | oil |
| Item Highlight | Delivers superior wear protection and thermal stability for heavy-duty diesel engines in extreme temperatures and heavy loads |
| Item Type Name | Motor oil |
| Item Weight | 38 pounds |
| Liquid Volume | 5 gallons |
| Manufacturer | Ultrachem LLC |
| Manufacturer Part Number | UFS1540CK4SNP |
| Manufacturer Warranty Description | 22 |
| Model Number | UFS1540CK4SNP |
| SAE J300 Viscosity Grade | 15W-40 |
| Size | 5 Gallon Pail |
| UPC | 810050657570 |
| Unit Count | 640 Fluid Ounces |
| Viscosity Level | Medium to High |
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