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.

Spotlight On Heavy-Duty Engine Oil

Spotlight On Heavy-Duty Engine Oil

Increased fuel economy & reduced greenhouse gases are being supported by lower HTHS ... Read More
Webinar: New API Oils Boost Your Fuel Efficiency

Webinar: New API Oils Boost Your Fuel Efficiency

Two new Heavy Duty API categories were introduced in December 2016, API CK-4 and FA-4. This webinar, recorded before its ... Read More
API CK-4 and FA-4 Quick Overview

API CK-4 and FA-4 Quick Overview

Scroll through our quick API CK-4 and FA-4 overview to learn the major points about the heavy duty category's latest ... Read More
About API CK-4 and FA-4

About API CK-4 and FA-4

The latest heavy-duty engine oil categories of API CK-4 and FA-4 saw first license December 1, 2016. Previously referred to ... Read More
Testing requirements for API CK-4 and FA-4

Testing requirements for API CK-4 and FA-4

API CK-4 and API FA-4 engine oils will see major upgrades in performance. These oils offer improved fuel efficiency, oxidation ... Read More
Understanding API CK-4 and FA-4

Understanding API CK-4 and FA-4

Launched in 2006, API CJ-4 the previous category for engine oil performance, was designed to meet the needs of exhaust ... Read More

Moving Up to API CK-4: A Win for the Industry

Lubricants that enable modern engine hardware, contribute to fuel economy gains, and maintain the highest possible protective benefits, are now ... Read More

Accelerating Efficiency with API FA-4 Engine Oils

The marketability of low viscosity lubricants for new engine hardware is beneficial for higher performance across the industry ... Read More

Squeezing Greater Efficiency Out of Heavy Duty Engine Oils

Increased fuel economy and reduced greenhouse gases are being supported by lower ‘high-temperature high-shear’ (HTHS) engine oil viscosity ... Read More

Regional Market Drivers in Brazil

Latin America is an increasingly important market for heavy duty diesel engine oil marketers–and Brazil, the region’s most powerful economy, ... Read More

Moving to Higher Performing Lubricants

Simply, switching to higher performing lubricants can be the right choice for your business. While the lubricants market evolves at ... Read More

PC-11A vs. PC-11B: What You Need to Know

The decision to split the upcoming PC-11 heavy duty engine oil category is a crucial one, driven by a shifting ... Read More
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