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Royal Purple

Royal Purple Duralec Ultra SAE 15W-40 Diesel Motor Oil - 83561

$51.20

SKU: R022 83561

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Description

Part #: 83561

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.

Features:

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

Motor Oil - Duralec Ultra - 15W40 - Synthetic - 1 gal Jug - Each

MIA's Description

The Royal Purple 83561 is a 1-gallon container of Duralec Ultra synthetic diesel motor oil with a 15W-40 viscosity. It is formulated to maximize performance and meet the demands of heavy-duty engines.

This oil features Royal Purple's Synerlec additive technology, which creates an ionic bond with metal surfaces for protection upon startup and increased film strength to prevent metal-to-metal contact. It offers superior corrosion protection, a low coefficient of friction for optimized fuel efficiency, and better wear protection.

Fitment

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Specifications

BrandRoyal Purple
Part NumberR022 83561

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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