RNS Number:8023Q
Clean Diesel Technologies, Inc
13 October 2003


Clean Diesel Technologies, Inc.


300 Atlantic Street, Suite 702, Stamford, CT 06901-2522 
Tel: (203) 327-7050 Fax: (203) 323-0461




NEWS RELEASE for October 13, at 2:30 AM EDT and 7:30 AM London Time

Contact:  Allen & Caron Inc           or      Clean Diesel Technologies, Inc.
          Jay F. McKeage (US investors)       James M. Valentine, President
          (212) 691-8087; jay@allencaron.com  David W. Whitwell, CFO
          Len Hall (US media)                 (203) 327-7050
          (949) 474-4300; len@allencaron.com

          Bankside Consultants
          Simon Bloomfield (UK media/investors)
          44 (0)20 7444 4140; simon.bloomfield@bankside.com



               CLEAN DIESEL ANNOUNCES RECEIPT OF EPA VERIFICATION
            OF NEW PLATINUM PLUS(R) PURIFIER DIESEL RETROFIT SYSTEM


           Results Indicate Dramatic Reduction in Diesel Particulates


STAMFORD, CT (October 13, 2003) . . . Clean Diesel Technologies, Inc. (CDT)
(EBB:CDTI & AIM:CDT/CDTS) announced today that it has received notification from
the US Environmental Protection Agency of verification of emissions reduction
performance of its Platinum Plus(R) Purifier System for retrofit to 1988-1993
diesel engines.  Rigorous engine dynamometer testing of the Platinum Plus
Purifier System after 1,000 hours of commercial service shows that the system
more than doubles the particulate matter (PM) reduction offered by traditional
diesel oxidation catalysts (DOCs) currently in use, without increasing nitrogen
dioxide (NO2) emissions.


Reductions of 40-50 percent in PM emissions were measured at Southwest Research
Institute (SwRI) on a 1991 certified Cummins medium heavy-duty diesel engine
typical of those used in school buses, municipal buses, delivery trucks and
refuse haulers.  These reductions were verified by the EPA under its rigorous
Environmental Technology Verification (ETV) test protocol.  This high level of
PM reduction was achieved from use of the Platinum Plus fuel-borne catalyst
(FBC) and a low-cost, specially catalyzed DOC used with commercial No. 2D fuel
and also with ultra-low sulfur diesel (ULSD) fuel.  Verification of the Platinum
Plus Purifier System is now posted on the EPA web site at www.epa.gov/otaq/
retrofit/retroverifiedlist.htm.


Verification follows recent field trials with beverage delivery trucks used in
commercial service in Texas as well as with refuse trucks in California. In
these programs the combination of Platinum Plus FBC and DOC purifier system was
demonstrated effective even in aggressive stop-and-go delivery service.
Reductions of 41percent were verified for application with normal No. 2D fuel
and up to 50% with ULSD.


Commenting on the verification, James Valentine, CDT President and Chief
Operating Officer, said, "Most other traditional DOCs give only 20-25 percent PM
reduction and can cause large increases in NO2 emissions, which, as a strong
ground-level lung irritant, are restricted by the California Air Resources Board
(CARB) and the Mining Safety Health Administration (MSHA).  In comparison with
traditional, heavily-catalyzed devices, the Platinum Plus Purifier System uses
only a fraction of the precious metals, by putting the catalyst in the fuel as
well as on the lightly- catalyzed DOC device. This dual-action approach reduces
more PM at lower costs without any increase in NO2 emissions.  In fact, NO2
emissions are lowered with the system by up to 40 percent."
CLEAN DIESEL ANNOUNCES RECEIPT OF EPA VERIFICATION
OF NEW PLATINUM PLUS(R) PURIFIER DIESEL RETROFIT SYSTEM
Page 2-2-2


"This patented combination technology maximizes engine performance and minimizes
the cost of compliance," Valentine continued.  "CDT has invested over a million
dollars in more than 100 tests at SwRI to separate the impact on emissions of
fuels, the FBC and catalytic devices, in order to optimize the system's
performance and minimize unwanted NO2 emissions."


"With the Platinum Plus Purifier System, fleets can start tomorrow with fuel
currently in use and get 40 percent PM reduction, knowing that reductions will
improve to as much as 50 percent when they switch to ULSD as it becomes
economically available.  In addition, over a dozen fleet trials have confirmed
an average of 8 percent fuel economy improvement from regular use of the FBC,
which more than pays for the FBC and helps offset the cost of the
lightly-catalyzed DOC."


The system should be especially attractive to local delivery fleets and school
buses with older, dirtier engines.  Typical retrofit capital costs for the
Platinum Plus Purifier System could allow as many as five school buses to be
retrofitted, versus one vehicle retrofitted for the same cost with a
traditional, heavily-catalyzed particulate filter.


CDT intends to supply verified systems directly to end-users and through a
planned network of licensed distributors.  The Platinum Plus FBC can be
delivered pre-blended in fuel by licensed fuel suppliers, or added to fuel
on-site by end-users using automatic dosing systems.  Several on-board dosing
systems are also under development.


About Clean Diesel Technologies, Inc.

Clean Diesel Technologies, Inc. is a specialty chemical company with patented
products that reduce emissions from diesel engines while simultaneously
improving fuel economy and power.  Products include Platinum Plus(R) fuel
catalysts, the Platinum Plus Purifier System, and the ARIS(R) 2000 urea
injection systems for selective catalytic reduction of NOx.  Platinum Plus and
ARIS are registered trademarks of Clean Diesel Technologies, Inc. For more
information, visit CDT at www.cdti.com or contact the Company directly.


Certain statements in this news release constitute "forward-looking statements"
within the meaning of the Private Securities Litigation Reform Act of 1995.
Such forward-looking statements involve known or unknown risks, including those
detailed in the Company's filings with the Securities and Exchange Commission,
uncertainties and other factors which may cause the actual results, performance
or achievements of the Company, or industry results, to be materially different
from any future results, performance or achievements expressed or implied by
such forward-looking statements.  Readers are cautioned not to place undue
reliance on these forward-looking statements, which speak only as of the date
hereof.

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