American Petroleum Institute (API)

The American Petroleum Institute (API) represents all aspects of America’s oil and natural gas industry, having more than 625 corporate members from all segments of the industry, from the largest major oil companies to the smallest of independents. These include producers, refiners, suppliers, marketers, pipeline operators and marine transporters, as well as service and supply companies that support all segments of the industry.

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 API engine oil specifications are used throughout the world and also used by many OEMs as the baseline performance upon which their own performance requirements are built.

ACEA 2016 Compliance Deadline: December 1, 2018

ACEA 2016 Compliance Deadline: December 1, 2018

From December 1, 2018, all engine lubricant formulations making ACEA performance claims must comply with the latest ACEA 2016 European ... Read More
Proposed Changes to the ACEA Light-Duty Oil Sequences

Proposed Changes to the ACEA Light-Duty Oil Sequences

The Light-Duty Sequences consist of detailed sets of specifications for light-duty diesel and gasoline engines, with differentiations for those with ... Read More
How Specification Development Impacts Society

How Specification Development Impacts Society

The certification of lubricant performance has important ramifications—not just for product performance, but for society at large ... Read More
The Real Impact of Engine Oil Performance

The Real Impact of Engine Oil Performance

The current process for certifying engine oil performance has some major implications not just for engine performance, but for the ... Read More
ACEA 2016 Becomes Mandatory

ACEA 2016 Becomes Mandatory

ACEA 2016 became mandatory on December 1, 2017 for all new formulations making performance claims against an ACEA Oil Sequence ... Read More
ACEA Oil Sequences in China

ACEA Oil Sequences in China

Vehicles sold by European OEMs in China are designed to comply with European emissions ... Read More

Keys to Success with API SN Plus Lubricants

API SN Plus, the critical supplement to ILSAC GF-5, saw first license on May 1. Oil marketers can, and should, ... Read More

Why Choosing API SN Plus Is Critically Important

On May 1, 2018 the American Petroleum Institute’s (API’s) SN Plus supplement went into effect, necessitating that all ILSAC GF-5 ... Read More

Announcing API SN Plus Supplement

The proposed supplement will be available alongside current API SN & ILSAC GF-5 ... Read More

AOAP Meeting Summary: September 8, 2016

Highlights: GM has formally withdrawn the GMOD from ILSAC GF-6. The ASTM PCEOCP voted to recommend that the Seq VIE ... Read More

AOAP Meeting Notes: June 30, 2016 Bellevue, WA

Highlights: Due to delays in test development, AOAP agrees that the April 1, 2018 first license date will not happen ... Read More

AOAP Meeting Notes: May 12, 2016 Detroit, MI

Highlights: First License Date: Group consensus that the April 1, 2018 1st license date is not achievable and a new ... Read More

AOAP Meeting Notes: March 17, 2016

Highlights: The AOAP voted the Chrysler Oxidation & Deposit Test (also known as the Sequence IIIH) suitable for inclusion in ... Read More

AOAP Meeting Summary: February 11, 2016

Highlights: ILSAC issued updated proposed GF-6A and GF-6B specifications. Changes include the removal of TEOST MHT (D7097) requirement from both ... Read More
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