PC-11 stands for Proposed Category 11, which is the next generation of diesel engine oil that will replace the current CJ-4 technology certified by the American Petroleum Institute (API). This means that the next generation of heavy duty engine oils will surpass the performance of the current CJ-4 category diesel engine oils, with some primary improvements to the category including:
PC-11 is being driven by changes in engine technology to meet emissions and fuel economy standards set by the EPA for CO2 and other greenhouse gases. New regulations coming into effect mid-year in 2017 are driving the need for the next generation of oils to address factors such as:
With the introduction of PC-11 engine oils and for the first time ever, the category is being split into two classifications. You will likely begin to hear the term high-temperature, high-shear (HTHS) viscosity being used to distinguish between the two.
High-HTHS engine oils are being referred to inside the industry as PC-11A. They will be licensed under the specification API CK-4.
Low-HTHS engine oils are being referred to inside the industry as PC-11B. They will be licensed under the specification API FA-4. These low-HTHS oils are being designed to provide fuel economy above and beyond current CJ-4 and new CK-4 oils through the use of thinner-viscosity fluids. These oils should provide fleets with the opportunity to achieve better fuel efficiency and reduced operating costs by using the right diesel engine oil for older and new engines, which should help reduce maintenance costs and downtime of equipment.
Older engines in your fleet will be able to use API CK-4 high-HTHS 15W-40/XW-30 oils
These engine oils will replace the oils you currently use and are compatible with all current vehicles and the previous API CJ-4, CI-4 Plus and CI-4 categories. They will be available in the same viscosity grades you use today including 15W-40 and XW-30.
They will offer improved:
Newer engines in your fleet will be able to use the new generation of more fuel-efficient API FA-4 low-HTHS oils
These engine oils will be OEM dependent, focusing on the next generation diesel engines. They will be available in low-HTHS XW-30 viscosity grades to help maximize fuel economy without compromising service life. These oils will also offer improved oxidation protection, stay-in-grade performance, and aeration control; however, they are expected to have limited, if any, backwards compatibility. The vehicle OEM or the owner’s manual should always be consulted regarding use restrictions.
What is Castrol’s approach to PC-11?
At Castrol, we are always keeping an eye on the future. We are committed to making sure that our heavy duty engine oils meet the needs of today’s engines, as well as tomorrow’s. As the new generation of cleaner, more fuel-efficient diesel engines emerges, we will be there with a new generation of high-performing diesel engine oils to protect them.
Our team of liquid engineers is actively working with our industry-leading additive suppliers to refine and shape the next generation of Castrol heavy duty engine oils that will meet the requirements of the new category specifications and deliver on the high-quality standards you’ve come to expect from Castrol.
We are committed to providing more industry updates as the first-licensing date of December 1, 2016 gets closer.