Keep your engine performing at its best when you add Royal Purple 15W-40 Duralec Ultra Synthetic Engine Oil 83561. Duralec Ultra features a Royal Purple’s proprietary Synerlec additive technology and is fortified with a high level of zinc/phosphorus anti-wear additive. Designed to provide improved film strength and superior protection, Synerlec bonds perfectly with metal surfaces and prevents metal-to-metal contact.
Recommended for use in both two-cycle and four-cycle diesel applications including automotive, commercial fleet and stationary industrial diesel engines, Duralec Ultra extends drain intervals and minimizes oil degradation. Very resistant to oxidation, Duralec Ultra synthetic solvency keeps internal engine parts cleaner than detergents alone.
- Keeps Engines Clean
- Extends Drain Intervals
- Greater Wear Protection
- Minimizes Oil Degradation
- Superior Corrosion Protection