API Service CI-4; For 2004 Severe Duty Diesel Engine Service

API Service Category CI-4 describes oils for use in high-speed, four-stroke cycle diesel engines designed to meet 2004 exhaust emission standards implemented in 2002. These oils are intended for use in all applications with diesel fuels ranging in sulfur content up to 0.5% weight.

These oils are specifically formulated to sustain engine durability where Exhaust Gas Recirculation (EGR) is used and the impact of these oils on other supplemental exhaust emission devices has not been determined. Optimum protection is provided against corrosive and soot-related wear tendencies, piston deposits, degradation of low- and high-temperature viscometric properties due to soot accumulation, oxidative thickening, loss of oil consumption control, foaming, degradation of seal materials, and viscosity loss due to shear.

API CI-4 oils are superior in performance to those meeting API CH-4, CG-4 and CF-4 and may be used in engines calling for those API Service Categories.

The first license date for API CI-4 will be September 5, 2002.

So far only 2 oils being sold in the Phils. claim to meet this:
Caltex Delo 400 (sold only in 20 liter pails and 200 liter drums)
Mobil Delvac 1

For latest API Service Classification click link below: (PDF format)

http://api-ep.api.org/filelibrary/Guidechart2002.pdf
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