Royal Purple Duralec Ultra 15W40 HD CI/4

SUPERSEDED TO 04154 

API-LICENSED MOTOR OIL

Royal Purple's API-licensed Motor Oil combines premium base oils with proprietary additive technologies to create high performance synthetic oil that optimizes engine performance. Our motor oil delivers superior protection and improves performance in gasoline and diesel engines.

Upgrade your vehicle to Royal Purple synthetic oil and feel the difference.

Royal Purple synthetic motor oils meet warranty requirements of most passenger car and light trucks sold in the U.S./North America. 

No special procedures are necessary when upgrading to Royal Purple. Royal Purple recommends waiting until the manufacturer's first scheduled oil change in new gasoline and diesel engines before upgrading to Royal Purple.

Royal Purple motor oil is compatible with synthetic and conventional motor oils. Available viscosities include: 0W-20, 0W-40, 5W-20, 5W-30, 5W-40, and 10W-30 weights. Royal Purple also offers mono-grade motor oils in SAE 30, SAE 40 and SAE 50 weights.

PERFORMANCE ADVANTAGES

BETTER WEAR PROTECTION
Enhanced additive technology prevents metal-to-metal contact beyond both dexos1T* and ILSAC GF-5 specs

INCREASED FUEL EFFICIENCY
A low coefficient of friction results in optimized fuel efficiency (the fuel economy of our 5W-30 meets the fuel economy requirements of a 5W-20 oil)

BETTER PROTECTION OF THE EXPENSIVE CATALYTIC EMISSION SYSTEM
Patented ZDDP additives optimize emissions catalyst system life

IMPROVED COMPATIBILITY WITH FUELS CONTAINING ETHANOL
Patented additive technology prevents the white sludge and lubrication starvation that can occur with 20% or higher ethanol fuel

SUPERIOR CORROSION PROTECTION
No rust observed in standard industry testing