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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
200 Massachusetts Avenue, NW
Washington, DC 20001-5571
Toll-free in the U.S. & Canada: 877-562-5187
Local & International: (+1) 202-682-8041

Media Contacts

Contact Diesel Oil Matters for information requests or to arrange meetings with API personnel.

Oil Category Guide

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.

Get your Toolkit