PC-10

The next EPA emission target becomes effective in 2006 and the process of defining engine oils to meet these new lower-emissions engines is well underway, and is named PC-10 during the development process. Ultimately, the set of requirements will become the next API category for heavy-duty diesel engines.

Later this year, for the first time, chemical limits will be placed on heavy-duty engine oils of the future. Since all diesel engines will be equipped with particulate traps, there will be a limit on sulfated ash, sulfur, and phosphorous levels.

There are eight proposed engine tests for PC-10 to meet the expectations of the various OEMs as is illustrated in the following tabulation.

Parameter	Engine Test and Sponsor
	Cummins ISM	Cummins ISB	GM 6.5L	CAT C-13	Mack T-12	Mack T-11	GM IIIG	Navistar 7.3L
Valve train wear
Liner wear
Ring wear
Bearing corrosion
Oxidation viscosity increase
Oil consumption
Piston deposit
Soot viscosity increase
Sludge
Filter plugging
Aeration

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