We’re here to help with any questions you might have regarding how to prepare your business for the switch to API CK-4 and API FA-4 and what you can do to maximize your benefits from these next-generation oils. Just fill in the form below or use the contact information that follows.
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American Petroleum Institute
Engine Oil Licensing and Certification System
1220 L Street, NW
Washington, DC 20005-4070
Toll-free in the U.S. & Canada: 877-562-5187
Local & International: (+1) 202-682-8041
Contact Diesel Oil Matters for information requests or to arrange meetings with API personnel.