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This paper outlines the history and background of the NLGI (formerly known as the National Lubricating Grease Institute) lubricating grease specifications, GC-LB classification of Automotive Service Greases as well as details on the development of new requirements for their High-Performance Multiuse (HPM) grease certification program. The performance of commercial lubricating grease formulations through NLGI's Certification Mark using the GC-LB Classification system and the recently introduced HPM grease certification program will be discussed. These certification programs have provided an internationally recognized specification for lubricating grease and automotive manufacturers, users and consumers since 1989. Although originally conceived as a specification for greases for the re-lubrication of automotive chassis and wheel bearings, GC-LB is today recognized as a mark of quality for a variety of different applications.

This paper features the results of emission tests conducted on diesel oxidation catalysts, and the combination of diesel oxidation catalysts and water blend fuel (diesel fuel continuous emulsion). Vehicle chassis emission tests were conducted using an urban bus. The paper reviews the impact and potential benefits of combining catalyst and water blend diesel fuel technologies to reduce exhaust emissions from diesel engines.

Since 1989, a research and development program has been ongoing to determine the viability of equipping a DDC 6V-92TA engine (the engine most commonly used in North America for transit buses) with a diesel particulate filter system. The engine is operated on a Southeastern Pennsylvania Transit Authority (SEPTA) Neoplan bus. The initial design targets included: the reduction of particulate emissions to levels below 0.1 g/bhp.hr. as well as the 1990 Clean Air Act Amendments, for carbon monoxide and hydrocarbons. a requirement for no ancillary hardware or energy sources in order to achieve regeneration. design simplicity for easy removal and inspection. good performance for normal SEPTA in-service conditions. low cost. Initially, baseline measurements were taken to determine under what conditions the filter system would have to perform. Several initial designs were evaluated with varying degrees of success.