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Detroit Diesel Participates in Emission Reduction Demonstration

7 October 1999

Detroit Diesel Participates in Emission Reduction Demonstration

    LOS ANGELES, Oct. 7 -- Detroit Diesel Corporation (DDC)
announced today its participation in an aggressive Emission
Reduction Demonstration Program in Southern California.  In cooperation with
ARCO, Johnson Matthey, and Engelhard, DDC will demonstrate advanced exhaust
aftertreatment technology.  The demonstration is made possible due to the
availability of ARCO's new clean diesel fuel named Emission Control (EC).  EC
diesel fuel contains no sulfur and enables catalysts and particulate filters
to operate efficiently and with effective longevity.
    Detroit Diesel introduced numerous emission reduction technologies during
the past several years and views fuel sulfur as a critical component for
ongoing emission reductions.  Diesel engines coupled with catalytic converters
and particulate filters will further reduce particulate and NOx emissions.
    Gasoline has been reformulated over recent years to make it compatible
with catalytic converters, resulting in significant emission reductions.
Similarly, reformulating diesel fuel makes it possible to apply the technology
for further emission reduction.  In addition, the use of reformulated clean
diesel, such as EC Diesel, would lower exhaust emission levels in the already
existing fleet of diesel powered vehicles.
    Approximately one hundred Detroit Diesel engines will operate on EC Diesel
during this demonstration program.  Vehicles operated by Ralph's Grocery and
Santa Monica City Big Blue Buses will demonstrate the benefits of the EC
Diesel as well as the benefits of the EC Diesel coupled with exhaust
treatment.
    Clean diesel fuel may well be the best "alternative fuel" for the State of
California and the rest of the United States.  Tim Tindall, Director of
Emissions Programs at Detroit Diesel said, "As a result of this demonstration,
we expect to show the viability of low sulfur diesel fuels along with an 80-
90% reduction in particulate matter, hydrocarbon and carbon monoxide emissions
out of the tailpipe.  In addition, we will demonstrate the viability of
retrofitting catalytic technology for existing vehicles."
    Detroit Diesel Corporation is engaged in the design, manufacture, sale and
service of heavy-duty diesel and alternative fuel engines, automotive diesel
engines, and engine-related products.  The Company offers a complete line of
diesel engines from 22 to 10,000 horsepower for the on-highway; off-road;
automotive; and power generation markets.  Detroit Diesel services these
markets directly and through a worldwide network of more than 2,800 authorized
distributors and dealer locations.  DDC is a QS-9000 certified company.
    Detroit Diesel's major shareholder is Penske Corporation, a closely-held,
diversified transportation services company whose operations include Penske
Truck Leasing Company, Diesel Technology Company, Penske Automotive Group,
Inc., Penske Auto Centers, Inc., and Penske Capital Partners, L.L.C.  The
Penske Group manages businesses with annual revenues exceeding $10 billion and
employs more than 33,000 people around the world.
    Detroit Diesel's World Wide Web address is http://www.detroitdiesel.com