SAE 15W-40 Synthetic Blend Heavy-Duty Motor Oil, API CK-4/SN

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U1P-Duty SAE 15W-40 Synthetic Blend 5 Heavy-Duty Motor Oil, API CK-4/SN is formulated with conventional and synthetic base oils and a premium additive package.

This oil is designed for use in for use in high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards as well as for previous model year diesel engines.

This oil is especially effective at sustaining emission control system durability where particulate filters and other advanced after treatment systems are used.

U1P-Duty SAE 15W-40 Synthetic Blend 5 Heavy-Duty Motor Oil, API CK-4/SN provide enhanced protection against oil oxidation, viscosity loss due to shear, and oil aeration as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot-related viscosity increase.

In addition to API CK-4, this oil exceeds the performance criteria of CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 and can effectively lubricate engines calling for those API Service Categories. When using this product in conjunction with fuel containing higher than 15 ppm of sulfur, consult the engine manufacturer for service interval recommendations.

Ultra1Plus™ Heavy-Duty SAE 15W-40 Synthetic Blend Motor Oil, API CK-4/SN highlights:

  • Outstanding oxidation stability.
  • Excellent soot and viscosity control.
  • Excellent oil consumption control.
  • Meets demanding specifications of key OEMs and latest API gasoline service category.
  • Formulated for smooth starting in cold weather.
  • Greater engine efficiency, long engine life and long oil life.
  • Reduces low temperature sludge build-up and high temperature deposits.
  • Corrosion protection and extended drain intervals for both new and old engines.
  • Low temperatures fluidity and pump-ability.
  • Resistance to corrosive and abrasive wear.
  • Long life of critical wear surfaces.

Ultra1Plus™ can export products worldwide. Products available for larger purchases, truckloads and pallets, please CONTACT US


Safety Data Sheets & Product Information:





warning.png WARNING: California Proposition 65

Typical Properties:  
SAE J300 Viscosity Grade 15W-40
Appearance Amber Transparent Liquid
Viscosity @ 40°C, cSt, ASTM D445 103.4
Viscosity @ 100°C, cSt, ASTM D445 14.5
Viscosity Index, ASTM D2270  145
CCS Apparent Viscosity, cP, ASTM D5293 5,100@-20°C
MRV Apparent Viscosity, cP, ASTM D4684  19,000@-25°C
Flash Point, °C (°F), ASTM D92 220 (428)
Pour Point, °C (°F), ASTM D97    -35 (-31)
Total Base Number, mg KOH/g, ASTM D2896 9
Exceeds Performance Requirements:
API CK-4, CJ-4, CI-4 Plus, CI-4, CH-4
ACEA E9-12  
Ford WSS-M2C171-F1
Cummins CES 20086
Mack EOS 4.5
DDC 93K222
Caterpillar ECF-3
Daimler MB 228.31
Volvo VDS-4.5
Renault Trucks RLD-4    
MTU Type 2.1
Deutz DQC III-10 LA


  • Avoid extremes of temperature.
  • Product in cardboard cartons must be stored under cover and away from damp conditions.
  • Drums (barrels) should be stored under cover if possible.
  • If drums must be stored outside then lay them on their side to prevent water collecting around the bungs.

Note: SAE 15W-40 Synthetic Blend Heavy-Duty Motor Oil, API CK-4/SN is available in bulk quantities at substantial savings. Use of bulk oil products is environmentally proactive. 



  • 4
    the condtainer is so flimsy that the oil overflows when trying to fill

    Posted by Robert J. Rogers on Nov 18th 2020

    The is used in an RV generator so I can't answer mileage questions. I felt that it was a bit expensive.

  • 5
    Good Product - Great Service

    Posted by David Penny on Jul 20th 2020

    Hard to tell if oil is good until something doesn't break... But the order was fulfilled quickly and the clear bottles lend a helpful monitor of the level of what's left: I did my first oil change on the new RV Generator and the reservoir is very slow to settle. After at least 15 top-offs I didn't spill a drop! I Would definitely buy this product again.