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SKU: 85456 | UPC: 641330854569
Royal Purple Duralec Ultra Diesel 10W30 CK-4 Motor Oil - 5 Gallon
The Royal Purple 85456 Duralec Ultra 10W30 CK-4 Motor Oil is the best high-performance diesel engine oil for heavy-duty applications, combining premium synthetic base oils with Royal Purple's exclusive Synerlec additive technology to deliver unmatched film strength, superior protection, and reduced operating costs. Providing up to 4X the film strength of leading competitors, Duralec Ultra optimizes engine performance, minimizes wear, reduces deposits, and keeps engines cleaner in demanding on/off-highway conditions ideal for over-the-road trucking, agriculture, construction, mining, or any diesel-powered equipment requiring maximum reliability and efficiency.
Key Features
- Synerlec Additive Technology: Proprietary formula provides up to 4X stronger film strength and superior lubricity for extreme protection
- Premium Synthetic Base Oils: Advanced formulation reduces friction, improves fuel economy, and extends drain intervals
- Superior Deposit Control: Enhanced synthetic solvency keeps engines clean and prevents sludge buildup
- CK-4 Performance: Meets or exceeds API CK-4 specifications for modern low-emission diesel engines
- Heavy-Duty Versatility: Optimized for rigorous applications commuting, trucking, agriculture, construction, and mining
- 5-Gallon Pail: Convenient bulk size for fleet maintenance, shops, or frequent oil changes
Specifications
| Specification | Detail |
|---|---|
| Part Number | 85456 |
| Viscosity | 10W-30 |
| API Rating | CK-4 |
| Size | 5 Gallon Pail |
| Base Oil | Premium Synthetic |
| Additive Technology | Synerlec (Royal Purple Proprietary) |
| Applications | Heavy-Duty Diesel Engines (On/Off-Highway) |
| Country of Origin | United States |
| Warranty | Limited (Royal Purple) |
| Shipping Weight | Approx. 38-40 lbs (5 Gallon) |
Product Notes
- 5-gallon pail – convenient for fleet, shop, or frequent use in diesel trucks/equipment
- Superior protection in extreme conditions reduces downtime and lowers cost of ownership
- Recommended for diesel engines requiring CK-4 performance check OEM specs for compatibility
Installation Notes
- Estimated time: Standard oil change drain old oil, replace filter, fill with Duralec Ultra
- Use proper fill amount per vehicle specs check dipstick for accurate level
- Professional oil change recommended ensure proper disposal of old oil
This Part Fits
| Application | Notes |
|---|---|
| Heavy-Duty Diesel Engines | Over-the-Road Trucking, Agriculture, Construction, Mining, Commercial Fleets |
| Common | Ford Power Stroke, GM Duramax, Ram Cummins, Caterpillar, Cummins, Detroit Diesel (CK-4 Approved) |
Why Choose Royal Purple Duralec Ultra 10W30 CK-4?
- Synerlec technology provides up to 4X film strength for maximum engine protection and reduced wear
- Premium synthetic base oils extend drain intervals, improve fuel economy, and keep engines clean
- Limited warranty trusted heavy-duty diesel oil from Royal Purple, leader in performance lubricants
Frequently Asked Questions
-
Q: Is this oil suitable for my 2020 Ram 2500 Cummins?
A: Yes, Royal Purple Duralec Ultra 10W30 CK-4 meets or exceeds CK-4 specs for modern diesel engines including Cummins. -
Q: Can I extend drain intervals?
A: Yes superior synthetic formulation often allows extended drains; follow OEM or oil analysis recommendations. -
Q: Does it reduce engine noise?
A: High lubricity and film strength often result in quieter operation and smoother performance. -
Q: What is the warranty?
A: Covered by Royal Purple limited warranty trusted for heavy-duty applications.
Shipping & Handling
- Method: UPS/FedEx Ground (Hazardous Material – Oil)
- Availability: In stock - ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 38-40 lbs (5 Gallon)
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