Is API CK-4 and FA-4 the same as PC-11?
PC-11 (Proposed Category 11) is the temporary term API used to identify the oil standards now labeled as API CK-4 and API FA-4 while the standards were in development. CK-4 and FA-4 will begin appearing in the API Service Symbol Donut on December 1, 2016.
What are the benefits of CK-4 and FA-4 oils?
CK-4 and FA-4 provide improvements in the following areas:
- Wear protection
- Oxidative stability
- Aeration control
- Protection against soot-related viscosity increase
- Emission system protection
- Piston deposit control
- Low- and high-temperature property control
What is CK-4?
CK-4 oils are designed for on-highway and non-road diesel engines currently in use. These oils are backward compatible, which means they can be used in applications where CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 oils are recommended. During its development, CK-4 was referred to as PC-11A.
Before switching to CK-4, check with your engine manufacturer and remember to use the viscosity grade recommended for your engine.
What is FA-4?
FA-4 oil provides the same benefits as CK-4 oil — superior wear and oxidation protection and enhanced shear stability — but will also include lower viscosity grades designed for next-generation diesel engines to help reduce emissions without sacrificing engine protection. However, FA-4 oils are neither interchangeable nor backward compatible with CK-4, CJ-4, CI-4 with CI-4 PLUS, CI-4, or CH-4 oils.
Some engine manufacturers may recommend FA-4 oils for their older engines, but operators must confirm the recommendation before using the oils. In many cases, engine manufacturers will only recommend FA-4 for newer engines.
Where can I get CK-4 or FA-4 oil?
The new products will be available through the same distribution channels that supply CJ-4 products.
When will CK-4 and FA-4 oils be available?
Products meeting the CK-4 or FA-4 specification can be sold beginning December 1, 2016. Consult your supplier for availability.
- Can I use CK-4 oil?
- When should I start using FA-4 oil?
How long will CJ-4 oils be available after the launch of CK-4?
The CK-4 standard is the replacement for CJ-4, but CJ-4 will remain a licensable API standard for the foreseeable future. Keep in mind that CK-4 oils are backward compatible and provide superior protection against wear and oxidation along with enhanced shear stability.
What kinds of diesel engines use CK-4?
Check with your engine manufacturer before moving up to CK-4, but most manufacturers recommending CJ-4, CI-4 with CI-4 PLUS, CI-4, or CH-4 oils will likely recommend CK-4 for their diesel engines in use today.
How do I know I'm getting a CK-4 oil?
Look for the API service symbol donut with “CK-4.” The CK-4 category will appear first, often followed by CJ-4, CI-4, and CH-4. The donut should look something like the one shown below.
How do I know if I'm getting an FA-4 oil?
Look for the modified API service symbol donut with “FA-4.” The donut could be in a variety of colors, but it should look like the one shown below.
Which category should I use for my big rig?
Engine manufacturers are expected to recommend API CK-4 oils for most on-highway engines using CJ-4 and earlier categories because the standard is backward compatible, but some manufacturers have begun recommending FA-4 for some of their on-highway engines. Manufacturers will also start recommending FA-4 for their new engines. Check with your manufacturer if you have any questions about which oil you should use in your big rig.Learn more here.
Which category should I use for my heavy duty construction equipment?
Engine manufacturers are expected to recommend API CK-4 oils for non-road diesel engines in heavy duty equipment using CJ-4 and earlier categories. Learn more here.
Which category should I use for my agricultural equipment?
Engine manufacturers are expected to recommend API CK-4 oils for non-road diesel engines used in agricultural equipment. Learn more here.
Which category should I use for my diesel pickup?
Engine manufacturers are expected to recommend API CK-4 oils for many diesel pickups but check with your manufacturer before making the switch. Learn more here.
Oil Category Guide
- Big Rigs
- Diesel Pickups
- Heavy Duty Construction Equipment
- Agricultural Equipment
Engine Oil Toolkit
Whether you’re looking for information on the new oil standards, seeking guidance on switching your fleet to these next-generation oils, or searching for practical recommendations to bring CK-4 and FA-4 oils into your shop, you’ll find answers in the toolkit.