8/17/2023 0 Comments Sae oil viscosity chart for f![]() ![]() Formulated to sustain engine durability where EGR is used. Intended for high speed 4-stroke diesel engines meeting 2004 US EPA on-highway emission standards implemented in 2002. In addition to providing control of the parameters listed for CG-4 oils, the classification provides additional control of: Intended for high speed 4-stroke diesels meeting 1998 US EPA emission standards and using fuels with less than 0.5% sulfur. In addition to providing control of the parameters listed for CF-4 oils, the classification provides additional control of: Especially for engines meeting 1994 emission standards. Intended for high speed, 4-stroke diesels used in on- and off-highway applications and using fuels with less than 0.5% sulfur. This service category was discontinued on June 30, 2008. corrosion and wear of copper containing bearings.Intended for high speed, 4-stroke, on-highway heavy-duty diesel engines meeting 1991 emission standards. This service category was discontinued on August 31, 2009.ĭoes not necessarily meet the requirements of CF or CF-4 oils. This service category was discontinued on December 30, 2010. wear and corrosion of copper containing bearings.Intended for off-road engines which use fuel containing more than 0.5% sulfur. A common reason for the obsolescence of the older categories is a lack or facilities and parts to run some of the key engine tests. By 2012, all service categories except CH-4, CI-4 and CJ-4 were obsolete and a new one was under development. Individual oils may however be designed to provide additional compatibility to those outlined in Table 1. For example, service category CI-4 is not required to be compatible with service categories CF or CF-2. While newer service category oils generally provide backward compatibility to older service categories, they may not be compatible with all older categories. Table 1 also provides information on the minimum backward compatibility of specific categories. From time-to-time, engine manufacturers may issue additional requirements if there is not a current API classification that meets their needs. Table 1 outlines some API “C” series service categories and the general performance requirements that the oil must meet. A description of the API service symbol and category mark can be found in the Engine Oil Guide published by the API. The API “S” series describes oil standards primarily for gasoline engines while the API “C” series describes oil standards for diesel engine service. Each letter/number designation identifies a service category (e.g., CI-4) which is linked to a series of tests that the oil must pass before it is allowed to carry that designation. The API Engine Oil Licensing and Certification System provides a simple designation of letters and numbers that allows engine manufacturers and oil marketers to clearly provide users with the information they need to ensure that the proper oil is selected for an engine. Global Performance Specification for Diesel Engine OilĪPI Classifications API Oil Service Categories.Oil classification systems have been also in place in the EU and Japan. In the USA, the API oil classification system provides a simple designation for engine oils to ensure that the proper type of oil is selected for an engine. Abstract: A number of oil specifications have been developed to ensure that lubricants provide all of the lubricating oil functions required in modern engines. ![]()
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