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Royal Purple
Royal Purple

Royal Purple Duralec Ultra Diesel 15W40 CK-4 Motor Oil - 1 Gallon

$117.00

On Backorder — Expected to ship by Jun 4, 2026

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Royal Purple Duralec Ultra Diesel 15W40 CK-4 Motor Oil - 1 GallonDiesel Engine Oil

Key Features

  • Extraordinary performance in older generation, high-output diesel engines
  • Maximum wear protection – up to 33% better than CK-4 requirements
  • Extended oil life – up to 40% better than CK-4 requirements
  • Improved cold flow operation and start-up protection
  • Reduced oil consumption
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About this part

Product Details

Duralec Ultra combines premium base oils with Royal Purple's proprietary additive technology, Synerlec, to create a high-performance motor oil that optimizes engine performance and provides superior protection in rigorous on/off highway applications. Synerlec provides unsurpassed film strength and lubricity – up to 4X more than top competitors. In addition, advanced synthetic solvency reduces engine deposits and keeps engines clean. The net result is a better performing engine, with reduced downtime and lower cost of ownership. Royal Purple recommends for use in a variety of heavy-duty applications including commuting, over-the-road trucking, agriculture, construction and mining.

Description

Royal Purple Duralec Ultra SAE 15W-40 Diesel Motor Oil

Specifications

Brand
Royal Purple
Manufacturer Part #
80561
UPC
641330805615

Royal Purple Duralec Ultra Diesel 15W40 CK-4 Motor Oil - 1 Gallon

$117.00