The People of America's Oil and Natural Gas Indusry

Who We Are

The American Petroleum Institute (API) is the only national trade association representing all facets of the oil and natural gas industry, which supports 10.3 million U.S. jobs and nearly 8 percent of the U.S. economy. API’s more than 625 members include large integrated companies, as well as exploration and production, refining, marketing, pipeline, and marine businesses, and service and supply firms. They provide most of the nation’s energy and are backed by a growing grassroots movement of more than 40 million Americans.

Although our focus is primarily domestic, in recent years our work has expanded to include a growing international dimension, and today API is recognized around the world for its broad range of programs:


We speak for the petroleum industry to the public, Congress and the Executive Branch, state governments and the media, through programs like Energy Tomorrow. We negotiate with regulatory agencies, represent the industry in legal proceedings, participate in coalitions and work in partnership with other associations to achieve our members’ public policy goals.

Research and Statistics

API conducts or sponsors research ranging from economic analyses to toxicological testing. We collect, maintain and publish statistics and data on all aspects of U.S. industry operations, including supply and demand for various products, imports and exports, drilling activities and costs, and well completions. This data provides timely indicators of industry trends. API's Weekly Statistical Bulletin is the most recognized publication, widely cited by the media.


For the past 90 years, API has led the development of petroleum and petrochemical equipment and operating standards. These represent the industry's collective wisdom on everything from drill bits to environmental protection, and embrace proven, sound engineering and operating practices and safe, interchangeable equipment and materials. API maintains more than 600 standards and recommended practices. Many have been incorporated into state and federal regulations; and increasingly are being adopted by the International Organization for Standardization (ISO), a global federation of more than 100 standards groups.


Each day, the oil and natural gas industry depends on equipment to produce, refine and distribute its products. The equipment used is some of the most technologically advanced available in the search for oil and natural gas and allows the industry to operate in an environmentally safe manner. Designed for manufacturers of production, drilling and refinery equipment, the API Monogram Program verifies that manufacturers are operating in compliance with industry standards. API also provides quality, environmental, and occupational health and safety management systems certification through APIQR. This service is accredited by the ANAB (ANSI-ASQ National Accreditation Board) for ISO 9001 and ISO 14001. Let APIQR’s industry expertise certify your organization to API Spec Q1, API Spec Q2, and OHSAS 18001.

API also certifies inspectors of industry equipment through our Individual Certification Programs (ICP), designed to recognize working professionals who are knowledgeable of industry inspection codes and are performing their jobs in accordance with those codes. Through our Witnessing Programs, API provides knowledgeable and experienced witnesses to observe critical material and equipment testing and verification. In helping to improve industry safety, API WorkSafe™ offers a program for service station owners to make sure their contractors have been trained to industry safety standards. API WorkSafe also offers an E&P Onshore Operations Safety Program for operators to ensure their workers and contractors are trained in industry safety practices. As the recognized leader in safety training, API WorkSafe offers UST Operator Training that meets both federal and state operator training requirements.

For consumers, API provides the API’s Engine Oil Licensing and Certification System (EOLCS). It is a voluntary licensing and certification program that authorizes engine oil marketers who meet specified requirements to use the API Engine Oil Quality Marks. These emblems go directly on each container of oil that retains the certification for and is there to help consumers identify quality engine oils for their gasoline and diesel-powered vehicles. The Motor Oil Matters program (MOM for short) is API’s new program for licensing motor oil distributors and oil change locations. MOM has one main goal—to make sure that consumers receive high-quality oil through a secure chain-of-custody structure. The MOM mark identifies distributor and oil change locations committed to providing motor oil meeting the performance standards recommended by most vehicle and engine manufacturers.


API organizes seminars, workshops, conferences and symposia on public policy issues. Through API Events and API Training, we provide training materials to help people in the oil and natural gas business meet regulatory requirements and industry standards.