








⚙️ Power your diesel with the ultimate synthetic shield — don’t let your engine settle for less!
Ultra 1Plus SAE 15W-40 is a full synthetic heavy-duty diesel engine oil engineered to exceed API CK-4/SN standards. It offers superior thermal stability, advanced wear protection, and reduced oil consumption, making it ideal for modern diesel engines with emission control systems. Packaged in a convenient 1-gallon size, it supports both on-highway and Tier 4 non-road applications, ensuring your engine runs cleaner, cooler, and longer.





| Viscosity | 15W 40 sae_grade |
| Brand | ULTRA 1PLUS |
| Vehicle Service Type | Truck |
| Flash Point | 220 Degrees Celsius |
| UPC | 810050658966 |
| Manufacturer | Ultrachem LLC |
| Size | 1 Gal (Most Popular) |
| Model | SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil, API CK-4/SN |
| Item Weight | 7.3 pounds |
| Product Dimensions | 4 x 8.25 x 11 inches |
| Item model number | UL108 |
| Manufacturer Part Number | UFS1540CK4SNG |
| OEM Part Number | UFS1540CK4SNG |
| Special Features | diesel |
Trustpilot
5 days ago
2 days ago