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Detroit Diesel Announces Series 60 Engine Fuel Economy Test Results

20 November 1998

Detroit Diesel Announces Series 60(R) Engine Fuel Economy Test Results
    DETROIT, Nov. 20 -- Detroit Diesel Corporation
(DDC) announced today the results of two independent fuel economy tests
conducted in the United Kingdom and reported by "Commercial Motor" and "Truck"
    DDC's Series 60 engine was used in both tests.  The Series 60 engine used
was emission certified to the European steady state test.  In the United
States, heavy duty engines like the Series 60 engine are certified using an
EPA test procedure that simulates mostly transient or "stop and go" driving
patterns.  As a result of a recent industry settlement with the EPA, a
supplemental steady state test, like those used in Europe, is being used to
verify U.S. emissions compliance.
    In a test conducted by England's Commercial Motor Magazine, an ERF EC 127
tractor, powered by a 430 hp Series 60 engine, was run on a Scottish test
route developed by the magazine.  The magazine had this to say, "Thanks to its
ultra-torquey Detroit Diesel Series 60 engine, this is the first 38 tonner
(83,600 lbs) to break the 8.5 mpg (Imperial gallons) barrier around our
demanding Scottish test route.  What can you say?  The Detroit ERF steam-
rollered our Scottish route flat, with superlative results on every section.
Possibly its most impressive performance was over our 'severe gradients'
section, heading south on the A68, when it achieved the rare distinction of
never coming out of the top half of the gear box."
    In a second test, conducted by England's Truck magazine, the ERF EC 127
was operated over a different test route.  Truck magazine had this to say,
"... when a truck smashes our (fuel economy) record by nearly 0.2 mpg we are
inclined to give it our seal of approval."
    Lud Koci, Vice Chairman of Detroit Diesel noted, "The Series 60 engine has
been the number one heavy-duty truck engine in North America for seven years
in a row.  These fuel economy results certainly speak well of the Series 60
engine's ability to produce world-class fuel economy in a wide range of
conditions.  The Series 60 engine has been, and will remain, the acknowledged
worldwide fuel economy leader."
    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; and provides financing through Detroit
Diesel Capital Corporation.  The Company offers a complete line of diesel
engines from ten to 10,000 horsepower for the on-highway; off-road;
automotive; and power generation markets.  Detroit Diesel services these
markets directly through a worldwide network of more than 2,500 authorized
distributors and dealers.  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., Penske Motorsports, Inc., and Penske Capital
Partner's.  The Penske group of businesses has annual revenues exceeding $6
billion and employs more than 28,000 people around the world.
    Detroit Diesel's World Wide Web address is