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Royal Purple Duralec Ultra Diesel Motor Oil

4.69 out of 5 stars 16 Customer Reviews

Royal Purple Duralec Ultra diesel motor oil is specifically formulated to maximize performance and meet the demands of today's heavy-duty engines. Duralec Ultra is

Royal Purple Duralec Ultra diesel motor oil is specifically formulated to maximize performance and meet the demands of today's heavy-duty engines. Duralec Ultra is fortified with a high level of zinc/phosphorus anti-wear additive, along with Royal Purple's proprietary Synerlec additive technology. Synerlec creates a tenacious ionic bond with metal surfaces, providing protection upon startup, and greatly increased film strength that helps to eliminate metal-to-metal contact, even under severe conditions. Additional performance advantages include: * Superior corrosion protection * Low coefficient of friction r

Royal Purple Duralec Ultra diesel motor oil is specifically formulated to maximize performance and meet the demands of today's heavy-duty engines. Duralec Ultra is fortified with a high level of zinc/phosphorus anti-wear additive, along with Royal Purple's proprietary Synerlec additive technology. Synerlec creates a tenacious ionic bond with metal surfaces, providing protection upon startup, and greatly increased film strength that helps to eliminate metal-to-metal contact, even under severe conditions. Additional performance advantages include: * Superior corrosion protection * Low coefficient of friction results in optimized fuel efficiency * Better wear protection * Natural solvency keeps engines cleaner than detergents alone * Oxidation and heat stability greatly extends oil drain intervals * Compatible with other mineral and synthetic motor oils * Reduces exhaust emissions * Mates engine parts * Will not harm seals * API warranty compliant * Recommended for 2- and 4-cycle diesels; including automotive, commercial fleet, and stationary industrial applications

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15w40 Royal Purple Duralec Ultra Diesel Motor Oil 83561

15w40 Royal Purple Duralec Ultra Diesel Motor Oil 83561

15w40 Royal Purple Duralec Ultra Diesel Motor Oil 83561

Engine Oil, Duralec Ultra, Synthetic, 15W-40, HD CI-4/SL, 1 Gallon, Each

Part Number: RPO-83561

4.92 out of 5 stars ( 13 )

Cannot be shipped Internationally

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Buy this gallon of Duralec, get 2 bottles of Max-Tane FREE!

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10w30 Royal Purple Duralec Ultra Diesel Motor Oil 83456

10w30 Royal Purple Duralec Ultra Diesel Motor Oil 83456

10w30 Royal Purple Duralec Ultra Diesel Motor Oil 83456

Engine Oil, Duralec Ultra, Synthetic, 10W30, 1 Gallon, Each

Part Number: RPO-83456

3.0 out of 5 stars ( 2 )

Cannot be shipped Internationally

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Special Offer

Buy this gallon of Duralec, get 2 bottles of Max-Tane FREE!

Cannot be shipped Internationally

15w40 Royal Purple Duralec Ultra Diesel Motor Oil 80561

15w40 Royal Purple Duralec Ultra Diesel Motor Oil 80561

15w40 Royal Purple Duralec Ultra Diesel Motor Oil 80561

Engine Oil, Duralec Ultra, Synthetic, 15W-40, HD CI-4/SL, 1 Gallon, Set of 3

Part Number: RPO-80561

5.0 out of 5 stars ( 1 )

Cannot be shipped Internationally

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Cannot be shipped Internationally

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