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USD 9.99
Part #: RP01154

Royal Purple 15W-40 Duralec Super Synthetic CK-4 Engine Oil 01154

Vehicle Fitment:
For All Diesel Engines - 1 Quart Bottle
Part #: RP01154
★★★★★ ★★★★★ 1 Reviews
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Add the Royal Purple 15W-40 Duralec Super Synthetic Engine Oil 01154 to your vehicle and get an API CK-4 engine oil. High performance engine oil, Royal Purple Duralec Super motor oil is made for emission-controlled diesel engines utilizing emissions equipment such as: DPF’s, Catalytic Converters, EGR, and SCR injection. Specifically formulated to maximize component life, Duralec Super motor oil extends drain intervals and improve fuel performance. 

The specially created formula found in Duralec Super motor oil delivers exceptional low temperature pumpability and resistance to high temperatures. Duralec Super motor oil also provides improved rust and corrosion protection, outstanding soot dispersancy and prevention of varnish and sludge formation.

  • Will Not Harm Seals
  • Keeps Engines Clean
  • Greater Wear Protection
  • Reduces Exhaust Emissions
  • Superior Corrosion Protection
  • Greatly Extends Oil Drain Intervals
  • API-Licensed CK-4 Diesel Motor Oils
Application Notes:
Allow 8,000 to 10,000 miles before use in diesel engines.
Royal Purple's motor oils are API certified and will not void new car warranties.


  • MPN 1154
  • SKU RP01154
  • GTIN 641330011542
  • ID 392
  • Manufacturer Name Royal Purple, Ltd.
  • Shipping Weight 2.00 lb.
  • Shipping Length 5 in.
  • Shipping Width 9 in.
  • Shipping Height 9 in.
  • Fuel Type Diesel
  • Warranty Info Limited
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Internal L6R59


★★★★★ ★★★★★
5.0/5 Stars out of 1 Reviews
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1436527 order number
Best oil on the market I use it in a race with methanol

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Questions and Answers

What is the recommend milage between oil changes on a Diesel engine when using Royal Purple Motor Oil?
View Staff Answer 

Royal Purple suggests adhering to manufacturer’s recommended oil change intervals for vehicles under warranty. For vehicles outside the OEM warranty, please see the recommendations below.

Diesel pick-up trucks and passenger cars with an oil capacity of 10 or more quarts:

For vehicles for which OEM warranty is not a concern, drain intervals can be extended up to 15,000 miles (24,000 km) or 12 months, whichever occurs first using Royal Purple SAE 15W-40 or HPS engine oils.

Passenger cars, light trucks and vans:

For vehicles for which OEM warranty is not a concern, drain intervals can be extended up to 12,000 miles (20,000 km) or 12 months, whichever occurs first, using Royal Purple SAE 15W-40. An extended interval of up to 15,000 miles (24,000 km) or 12 months, whichever occurs first, is recommended when using Royal Purple HPS oils.

The extended drain intervals provided above apply primarily to street-driven, mechanically sound vehicles. For guidelines specific to your vehicle, we recommend contacting the Royal Purple Automotive Technical Department.

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