--- product_id: 497839621 title: "SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon" brand: "ultra 1plus" price: "R9627" currency: ZAR in_stock: true category: "Ultra 1 Plus" url: https://www.desertcart.co.za/products/497839621-sae-15w-40-full-synthetic-heavy-duty-diesel-engine-oil store_origin: ZA region: South Africa --- # Boosts fuel efficiency Stable viscosity under stress Superior engine wear protection SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon **Brand:** ultra 1plus **Price:** R9627 **Availability:** βœ… In Stock ## Summary > πŸ›’οΈ Power your diesel with the ULTRA edge – because your engine deserves the best. ## Quick Answers - **What is this?** SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon by ultra 1plus - **How much does it cost?** R9627 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/497839621-sae-15w-40-full-synthetic-heavy-duty-diesel-engine-oil) ## Best For - ultra 1plus enthusiasts ## Why This Product - Trusted ultra 1plus brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Engine Armor:** Full synthetic formula that slashes wear and extends engine life for heavy-duty reliability. - β€’ **Clean Machine:** Fights soot, sludge, and oxidation to keep your engine spotless and running longer. - β€’ **Universal Power:** Exceeds multiple API standards, making it the go-to oil for a wide range of diesel engines. - β€’ **Viscosity Vigor:** Strong shear stability keeps oil thick and effective even in extreme conditions. - β€’ **Fuel-Smart Formula:** Minimizes oil consumption, translating to better fuel economy and fewer pit stops. ## Overview ULTRA 1PLUS SAE 15W-40 is a full synthetic heavy-duty diesel engine oil designed to protect and enhance engine performance. It offers superior wear reduction, maintains optimal viscosity under stress, combats deposits and oxidation, improves fuel efficiency, and meets or exceeds API CK-4 and related standards. Packaged in a convenient 4-gallon value size, it’s engineered for universal fit across diesel trucks and heavy machinery. ## Description Buy SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon | Delivers superior wear protection and thermal stability for heavy-duty diesel engines in extreme temperatures and heavy loads: Motor Oils - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases ## Features - API CK-4 / SN CERTIFIED 15W-40 FULL SYNTHETIC DIESEL OIL: U1P 15W40 diesel oil xceeds API CK-4, CJ-4, CI-4 PLUS, CH-4 and SN. Specifically engineered for 2020+ on-highway trucks and Tier 4 non-road diesel engines - SUPERIOR HEAVY-DUTY ENGINE PROTECTION: Advanced full synthetic formula protects against wear, piston deposits, soot thickening, oxidation, shear loss, and aeration β€” keeping your engine cleaner and running longer - EXCEPTIONAL SHEAR STABILITY & HIGH-TEMPERATURE PERFORMANCE: Maintains precise 15W-40 viscosity under extreme stress, heat, and heavy loads. Prevents breakdown and delivers reliable protection for long-haul trucks, construction, and agriculture equipment - REDUCED OIL CONSUMPTION & EMISSIONS SYSTEM COMPATIBILITY: Minimizes oil burn-off while protecting DPF, EGR, and after-treatment systems. Helps extend service intervals and maintain emission compliance - VERSATILE DIESEL & MIXED FLEET COMPATIBILITY: Backward compatible with all previous four-stroke diesel engines. Also suitable for gasoline heavy-duty applications requiring API SN. One oil for your entire fleet ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B5Y1XWYQ | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #81,387 in Automotive ( See Top 100 in Automotive ) #542 in Motor Oils | | Brand | ULTRA 1PLUS | | Brand Name | ULTRA 1PLUS | | Compatible with Vehicle Type | Buses, Off-road / Industrial equipment, Truck, Vans | | Container Type | Jug | | Customer Reviews | 4.7 out of 5 stars 74 Reviews | | Flash Point | 220 Β°C | | Included Components | Motor Oil | | Item Highlight | Delivers superior wear protection and thermal stability for heavy-duty diesel engines in extreme temperatures and heavy loads | | Liquid Volume | 1 gallons | | Manufacturer | Ultrachem LLC | | Manufacturer Part Number | UFS1540CK4SNG | | Manufacturer Warranty Description | 22 | | Model Number | UL108 | | Number of Packs | 1 | | Package Information | Jug | | SAE J300 Viscosity Grade | 15W-40 | | Size | 1 Gallon Jug | | UPC | 810050658966 | | Unit Count | 128 Fluid Ounces | | Vehicle Service Type | Buses, Off-road / Industrial equipment, Truck, Vans | | Viscosity Level | Medium to High | ## Product Details - **Brand:** ULTRA 1PLUS - **Liquid Volume:** 4 gallons - **Package Information:** Jug - **SAE J300 Viscosity Grade:** 15W-40 - **Vehicle Service Type:** Buses, Off-road / Industrial equipment, Truck, Vans ## Images ![SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon - Image 1](https://m.media-amazon.com/images/I/81REEzr7aDL.jpg) ![SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon - Image 2](https://m.media-amazon.com/images/I/81TG85xQTVL.jpg) ![SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon - Image 3](https://m.media-amazon.com/images/I/81HWujrYsnL.jpg) ![SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon - Image 4](https://m.media-amazon.com/images/I/81Us0qA-z9L.jpg) ![SAE 15W-40 Full Synthetic Heavy-Duty Diesel Engine Oil API CK-4/SN 1 Gallon - Image 5](https://m.media-amazon.com/images/I/71FY2+FJzmL.jpg) ## Available Options This product comes in different **Size** options. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/497839621-sae-15w-40-full-synthetic-heavy-duty-diesel-engine-oil](https://www.desertcart.co.za/products/497839621-sae-15w-40-full-synthetic-heavy-duty-diesel-engine-oil) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-11-04*