Royal Purple Duralec Super 15W-40 CK-4 Diesel Oil 1 Quart (Case of 6)
⚠ Call for Availability
This item may be on backorder. Please contact us to confirm supplier availability and estimated lead time before ordering.
Regular price
$83.94
Verified Fitment & Application Support
This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.
Got Questions? Feel free to email us or call us at (503) 235-1947
Compliance & Restrictions
California Proposition 65
WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer and/or reproductive harm. For more information, visit
www.P65Warnings.ca.gov.
Royal Purple Duralec Super SAE 15W-40 is the brand's API-licensed CK-4 synthetic heavy-duty diesel engine oil. Duralec Super is an API-licensed CK-4 heavy-duty diesel engine oil built for emissions-controlled engines running diesel particulate filters, diesel oxidation catalysts, EGR and SCR systems on ultra-low sulfur diesel fuel.
This listing is the factory case of six one-quart bottles, part number 06154. Quart bottles are the practical choice for topping off between services, for small sumps, and for keeping a spare in the truck.
Key Features
- API-licensed CK-4 and backward compatible with CJ-4, CI-4 Plus and CI-4 warranty requirements
- Low-ash (reduced SAPS) chemistry that protects DPFs, oxidation catalysts and SCR hardware
- Enhanced oxidation resistance to slow oil aging, acid build-up and viscosity increase
- Wear protection for piston rings, valve train and bearings beyond CK-4 minimums
- Strong detergency for deposit and sludge control across the service interval
- Corrosion protection during operation and while the engine sits shut down
Applications and Approvals
Royal Purple lists Duralec Super 15W-40 against API CK-4, CJ-4, CI-4 Plus and CI-4 warranty requirements, along with ACEA E7-16 and E9-16, Caterpillar ECF-3, Cummins CES 20086, Daimler MB 228.31, Detroit Diesel DFS 93K222, Deutz DQC III-10 LA, Ford WSS-M2C171-F1, JASO DH-2, Mack EO-S-4.5, MTU Type 2.1, Renault RLD-4 and Volvo VDS-4.5.
Royal Purple lists Duralec Super as its recommended diesel engine oil for automotive and light-truck diesels, four-cycle marine diesels, and fleet equipment. Always follow the viscosity grade and oil specification printed in your owner's manual.
Product Details
- Brand: Royal Purple
- Manufacturer Part Number: 06154
- Product Line: Duralec Super Diesel Motor Oil
- SAE Viscosity Grade: 15W-40
- Package: 1 quart bottle, case of 6 (six quarts total)
- Typical Properties: Viscosity 108 cSt at 40 C and 15.2 cSt at 100 C, viscosity index 146, flash point 234 C (454 F), pour point -45 C (-49 F), cold crank simulator 4628 cP at -20 C, TBN 10 mg KOH/g, sulfated ash 0.98 percent
Shipping Height: 7.4
Shipping Length: 9.4
Shipping Width: 8.8