Royal Purple Duralec Ultra 15W-40 Synthetic Diesel Oil 5 Gallon Pail
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Regular price
$235.99
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 Ultra SAE 15W-40 in a five-gallon pail, part number 85561. Duralec Ultra is built around Royal Purple's proprietary Synerlec additive technology, which the manufacturer rates at up to four times the film strength of leading competitors.
Royal Purple publishes an HTHS of 4.1 cP at 150 C for Ultra 15W-40, at the high end for a 15W-40, which is part of why it is positioned for older high-output engines and heavily loaded duty cycles. The pail is the middle package between bottles and a drum.
Key Features
- Synerlec additive technology for high film strength and lubricity
- Wear protection rated by Royal Purple at up to 33 percent better than CK-4 requirements
- Oil life rated at up to 40 percent better than CK-4 requirements
- Improved cold-flow behavior and start-up protection
- Reduced oil consumption and advanced synthetic solvency to keep internals clean
- Suited to older-generation, high-output diesel engines as well as current on/off-highway equipment
Applications and Approvals
Royal Purple recommends Duralec Ultra 15W-40 where the following are called for: ACEA E7-16 and E9-16; Caterpillar ECF-1, ECF-2 and ECF-3; Cummins CES 20076, 20077, 20078, 20081 and 20086; Daimler MB 228.3 and 228.31; Detroit Diesel DFS 93K214 and 93K222; Ford WSS-M2C171-F1; Mack EO-N Premium Plus and EO-S 4.5; MTU Type 2 and 2.1; Renault RLD, RLD-2 and RLD-4; and Volvo VDS-3 and VDS 4.5.
Royal Purple recommends Duralec Ultra for heavy-duty duty cycles including commuting, over-the-road trucking, agriculture, construction and mining, on and off highway. Check the oil specification in your owner's manual before switching.
Royal Purple states that Duralec Ultra meets or exceeds the performance requirements of API CK-4, CJ-4 and CI-4+, but that it is not an API-licensed CK-4 oil. If your engine warranty requires a licensed CK-4 oil, use Duralec Super instead.
Product Details
- Brand: Royal Purple
- Manufacturer Part Number: 85561
- Product Line: Duralec Ultra Diesel Motor Oil
- SAE Viscosity Grade: 15W-40
- Package: 5 gallon pail
- Typical Properties: Viscosity 101.13 cSt at 40 C and 14.7 cSt at 100 C, viscosity index 151, flash point 232 C (450 F), pour point -45 C (-49 F), cold crank simulator 3672 cP at -20 C, HTHS 4.1 cP at 150 C, TBN 9.6 mg KOH/g, sulfated ash 1.04 percent
Shipping Height: 9.8
Shipping Length: 14.8
Shipping Width: 10.5