What's New

New Addendum to the 16th Edition of API 1509 Now Available, click here.

API Announces Discontinuation of Licensing Diesel Engine Oils with API CF-4 Specification

On June 30, 2008, API will discontinue licensing diesel engine oils against the API CF-4 specification. API’s decision to cease CF-4 licensing became necessary after the ASTM Heavy Duty Engine Oil Classification Panel (HDEOCP) determined that it could not establish correlation between a now unavailable engine sequence test required by API as proof of CF-4 performance and existing diesel engine sequence tests. With no viable replacement for this CF-4 test, API had no choice but to discontinue licensing against the CF-4 specification. The Engine Manufacturers Association (EMA) has endorsed API’s decision to discontinue licensing of CF-4.  To download a full copy of this notice letter, click here.

API Announces New Service Category for Diesel Engines: CJ-4

On October 15, 2006, API will begin certifying diesel oils against a new Service Category API CJ-4. API CJ-4 describes oils for use in high-speed four-stroke cycle diesel engines designed to meet 2007 model year on-highway exhaust emission standards as well as for previous model years. These oils are especially effective at sustaining emission control system durability where particulate filters and other advanced aftertreatment systems are used. More information on API CJ-4 including frequently asked questions can be found at www.apicj-4.org. Stay tuned for application information on this new service category.

16th Edition of API 1509 Now Available

API is pleased to announce that it has issued the 16th Edition of API 1509, Engine Oil Licensing and Certification System. This new edition provides information on API Service Categories SM and CJ-4 and includes updates of base oil interchange and viscosity grade read-across guidelines. Additionally, for the first time, API 1509 can be downloaded for free. To get your copy, click here.