Wear Protection in PC-11 Oils: Engine Durability Means Higher ROI

by on July 13, 2016 6 Comments

CheckTheEngine_BlogWe’re continuing our blog series focused on the key traits associated with engine oil and how those will be impacted by the new PC-11 specifications. In this installment, we focus on wear protection — protecting engines from wear is one of the most pivotal functions of the motor oil.

Engine oils are carefully balanced combinations of petroleum base oil and chemical additives that work together to provide effective lubrication of engine parts. It also is critical that the oil maintain its wear protection properties throughout the life of the oil. The new API CK-4 and API FA-4 specifications place new demands on oil performance – and introduce new challenges to ensure that these lubricants are effective even at low viscosities.

Wear protection pays off over the long term. A lubricant that provides robust wear protection helps maximize the life of the engine as a whole, while enhancing the reliability of individual components. This contributes to lower maintenance costs and more time on the road. The net effect is lower total operating costs and a higher return on the investment in your equipment.


Key Areas for Wear Protection

When considering heavy duty motor oil (HDMO) it is important to optimize protection in all of the critical areas of the engine, including:

  • Overhead components: providing effective lubrication to the cam, followers, and other valve train components – even when the oil is thickened by abrasive contaminants like soot.
  • Power cylinder: ensuring that the oil is robust to provide lubrication between the piston rings and the liner without breaking down and forming deposits that can lead to other issues including loss of oil consumption control.
  • Bottom end: maintaining sufficient oil film thickness to protect highly loaded bearings, while providing corrosion protection.


The performance requirements for wear protection for the new API categories are the same for both API CK-4 and the new lower viscosity API FA-4 specification. This means that you can be assured of the same robust wear protection delivering the same level of performance regardless of viscosity grade. For more information, please visit: www.PC-11Explained.com.


NOTE: This is the third part of a 4-part series focusing on the key traits to look for in CK-4 and FA-4 oils.

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About the Author ()

Shawn’s career spans nearly 20 years focused exclusively on research and engineering dealing with heavy-duty engine lubricants, fuels, and materials. Before joining Chevron in 2013, he spent 12 years leading global fluids and materials engineering activities for Cummins. He also spent five years conducting lubricant, fuel, and emission research for the Department of Energy’s National Renewable Energy Laboratory in Golden, CO. At Chevron, he is a Senior Staff Engineer primarily responsible for product formulation of the Delo Brand of Heavy Duty Engine Oils. He is currently the lead formulator responsible for development of Chevron’s PC-11 product line upgrade. Whitacre is the new chairman of the ASTM Heavy-Duty Engine Oil Classification Panel, which is tasked with the final development of the Proposed Category 11 (PC-11) requirements that take effect in late 2016.

Comments (6)

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  1. glenandmargaret@gmail.com' Glen G Nelson says:

    Please define the term “ROI”.

  2. Shawn Whitacre says:

    ROI = Return on Investment — does the benefit outweigh the cost?

  3. mcdjamey@msn.com' Jamey McDaniels says:

    We still have a number of the older Ford Powerstroke (7.3L and 6.0L) diesels in our service fleet. They have the HEUI system. Has this new spec been tested in them? Is there any reason for concern with the new changes, foaming, shear values etc.?

  4. Shawn Whitacre says:

    API CK-4 oils are suitable for use in your Powerstroke engines. The API CK-4 specification is backwards compatible and will leverage all of the test requirements of the current category, along with two new tests. One of the new tests drives performance improvements in oil aeration, which is important for protection of HEUI systems. In addition, new requirements have been put in place to improve shear stability. As always, you’ll need to follow OEM recommendations for viscosity grade and oil drain interval.

  5. normtrk@pacbell.net' Norm Collins says:

    I currently use Mobile 1 in my 2013 GMC 2500 Turbo diesel engine. Can I switch to throw need DELO Syn the tickets 5W-40?

    • Shawn Whitacre says:

      Thanks for your question! For the model year 2013 GMC 2500 with the Duramax diesel engine, General Motors recommends the use of engine oils meeting API CJ-4 performance standard and the SAE 5W-40 viscosity grade is recommended for all-season application. Chevron Delo 400 LE Synthetic SAE 5W-40 meets these requirements and is an excellent choice for this truck.


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