So much for precluding the development of diesel engine oil standards by individual engine manufacturers. Detroit Diesel Corp. announced a specification for oils to be used in its 2002 and later engines last week, just four months after the launch of API CI-4 Plus, an upgrade that was supposed to put an end to spec proliferation.
The new specification is Power Guard 93K214, and Detroit Diesel recommends that oils certified as meeting it be used in trucks model year 2002 and later that are equipped with its Series 50, Series 60, MBE 900 and MBE 4000 engines. The company used CI-4 Plus as the core of its spec, but said it was compelled to go beyond the industry standard because of rapidly changing engine designs. In particular, officials said they needed a way to identify oils that provide adequate lubrication in engines that use cooled exhaust gas recirculation to reduce emissions.
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