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Detroit Diesel Delivers First Series 50 EGR Bus & Coach Engine

5 June 2000

Detroit Diesel Delivers First Series 50 EGR Bus & Coach Engine

    DETROIT - Detroit Diesel Corporation delivered the first Series 50 EGR 
engine to Pace, the suburban bus division of the Regional Transportation 
Authority in Arlington Heights, Illinois.  The new Series 50 bus engine features
both exhaust gas recirculation (EGR) and variable nozzle turbocharger technology
.  EGR and VNT are both controlled by Detroit Diesel Electronic Controls (DDEC).

    "DDC is the first major heavy-duty engine manufacturer to offer EGR and
VNT on a high volume production engine.  EGR systems have been refined over
the years as a result of their wide spread use in the automotive industry.
Detroit Diesel has been supplying automotive diesel engines equipped with EGR
since 1991.  Detroit Diesel has had Series 50 field units in service since
mid-1999 accumulating over 500,000 test miles and will deliver over 7,500
Series 50 engines to the Bus market in advance of October 2002," according to
Pat Scully, Vice President of Bus & Coach Sales for Detroit Diesel.

    To meet the 2000 bus emissions standards, DDC chose to combine the proven
Series 50 engine platform and DDEC IV, with state-of-the-art EGR.  The
addition of VNT further enhances the system.  There are other approaches to
meet the new emissions standards, such as simply retarding engine timing.
However, retarded timing alone without other technology results in a
noticeable loss of fuel economy and acceleration.  By using EGR and VNT,
controlled by DDEC, DDE is able to give customers the best package of
performance, economy, low cost of operation and low emissions.

    "Pace is pleased to be the first North American transit bus property to
introduce the Series 50 EGR engine on a production basis.  The initial
performance results on the pilot bus are very positive and we look forward to
providing the citizens of suburban Chicago with the cleanest transit bus
diesel engine available today," says Larry Braun, Chief Inspector, Maintenance
and Technical Services.

    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 and
automotive markets.  Detroit Diesel services these markets directly and
through a worldwide network of more than 2,700 authorized distributor 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.  Penske
Corporation and its subsidiaries manage businesses with annual revenues
exceeding $10 billion and employ more than 33,000 people around the world.