RNS Number:0632L
Clean Diesel Technologies, Inc
14 May 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 May 14, 2003 at 7:30 AM London Time & 2:30 AM EDT

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




                       CLEAN DIESEL TECHNOLOGIES REPORTS
                           2003 FIRST-QUARTER RESULTS

STAMFORD, CT (May 14, 2003) ... Clean Diesel Technologies, Inc. (CDT) (EBB:CDTI
& AIM:CDT/CDTS) today reported an increase in revenue in the first-quarter of
2003 compared to the prior year period.  Total revenue for this year's first
quarter was $96,000 with a net loss attributable to common stockholders of
$907,000, or a $0.08 loss per share.  This compares to total revenue of $71,000
and a net loss attributable to common stockholders of $662,000 or a $0.06 loss
per share for the same period in 2002.   Total expenses in the 2003 first
quarter increased from the first quarter of 2002 as a result of field testing
and verification expenses and higher sales and marketing costs for the Company's
fuel borne catalyst (FBC).

President and Chief Operating Officer James M. Valentine commented, "There have
been a series of significant developments for the Company and its technologies
during the first quarter. Looking forward, the US diesel retrofit
emission-reduction market is beginning to open up for CDT.  CARB has
requirements which begin phasing in at the end of 2003, for retrofitting
California's 1.2 million diesel engines for  reductions in diesel particulate
emissions.  CARB recently issued a technology assessment for refuse trucks,
highlighting CDT's Platinum Plus(R) FBC and flow through filter as one of the
systems likely to be applicable to a wide range of vehicle types and operating
conditions."

"The Environmental Protection Agency's (EPA) voluntary retrofit program in the
other 49 states is also gaining momentum with the recent announcement of
specific diesel emission-reduction programs by the EPA," Valentine said.  "These
include programs such as the "Smartway Transport Program" for major corporate
fleets and the "Clean School Bus" initiative that targets the retrofit of
290,000 school buses. The Company's approach of using Platinum Plus FBC and
lightly catalyzed aftertreatment devices reduces the cost and improves the
performance of diesel retrofits."

CDT recently announced a partnership with Coca-Cola Enterprises (CCE), a charter
member of the Smartway Transport Program, to complete engine and field trials of
CDT's patented and EPA registered FBC with specially catalyzed aftertreatment
devices to reduce diesel emissions on CCE's delivery fleets.  The CCE engines
are the same as those widely used in delivery fleets, refuse trucks and school
buses.


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CLEAN DIESEL TECHNOLOGIES REPORTS 2003 FIRST QUARTER RESULTS
Page 2-2-2

The Company is proceeding with its first verification under CARB and EPA test
protocols for its Platinum Plus FBC and an aftertreatment device.  Field
durability testing was recently

completed on one of several systems and CDT expects to complete the final engine
verification test later in the second quarter assuming engine test cell
availability.

In conjunction with New Mexico based CleanAIR Systems, the Company is actively
marketing to the mining industry its Platinum Plus FBC in combination with a
specially catalyzed filter that reduces particulates in underground mines by 85
percent without increasing NO2.  CDT and CleanAIR Systems recently received
formal acceptance from the Mining Safety Health Administration's (MSHA) for the
FBC and specially catalyzed filter.  This combination is the only catalytic
precious metal system accepted for use in underground mines.  NO2 is a strong
lung irritant and both CARB and MSHA have put restrictions on NO2 emissions.
Traditional heavily catalyzed systems cause a large increase in NO2 emissions.
Their use has recently been prohibited in mines.  MSHA has mandated a reduction
in particulates in mines, with commitments for compliance required by July 2003.

As previously announced, during the first quarter, testing of the Platinum Plus
FBC with a proprietary diesel particulate filter supplied by Mitsui  and
PUREarth was conducted at SouthWest Research Institute. The results showed
dramatic emission reductions while meeting CARB NO2 limits."  The parties expect
to have further announcements in the near future on the joint technology.  Power
generation applications for the FBC were expanded from stationary utility
diesels to offshore drilling platforms and home heating oil-fired furnaces for
the control of soot and opacity.

The Company continues to add ARIS(R) licensees for its urea selective catalytic
reduction (SCR) technology. In April, CDT announced a mobile ARIS retrofit
license for the US with Monroe, CT-based Combustion Component Associates, Inc.
under which CDT received an upfront license fee of $150,000 plus royalties on
systems sold.  In addition, late last year, CDT completed an exclusive license
agreement with Mitsui Co. Ltd. for the mobile application of CDT's ARIS
technology in Japan.  Mitsui has previously licensed the stationary ARIS
technology for Japan.  The Company is also in discussions for ARIS licenses with
several other US and European companies. The Company's patented exhaust gas
recirculation/selective catalytic reduction (EGR/SCR) combination can already
achieve NOx limits for new engines that are required in 2007.

Full financial information is included in the Company's Form 10-Q
filed with the Securities and Exchange Commission (www.SEC.gov).


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.  Products include Platinum Plus(R) fuel borne catalysts
which reduce engine out emissions of particulate (PM), carbon monoxide (CO) and
hydrocarbons (HC), while improving fuel economy and also increasing



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CLEAN DIESEL TECHNOLOGIES REPORTS 2003 FIRST QUARTER RESULTS
Page 3-3-3


the regeneration of diesel particulate filters, 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.



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.



                                 TABLES FOLLOW

CLEAN DIESEL TECHNOLOGIES REPORTS 2003 FIRST QUARTER RESULTS
Page 4-4-4




                        CLEAN DIESEL TECHNOLOGIES, INC.

                            STATEMENT OF OPERATIONS


                      (in thousands except per share data)


                                                                                     
                                                      Three Months Ended
                                                          March 31
                                                  2003                 2002
Revenue:                                                                   
Product revenue                                    $88                  $60
License and royalty revenue                          8                   11
Total revenue                                       96                   71                 

Costs and expenses:                                                        
Cost of sales                                       57                   44
General and administrative                         692                  556
Research and development                           248                  111
Patent filing and maintenance                       10                   28

Loss from operations                             (911)                (668)
Interest income                                    (4)                 (15)
Interest expense                                     -                    9

Net loss attributed to common stockholders     $ (907)              $ (662)

Basic and diluted loss per common share       $ (0.08)             $ (0.06)
Weighted average number of common shares                                   
  Outstanding - basic and diluted               11,968               11,214
                                                                                                 

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CLEAN DIESEL TECHNOLOGIES REPORTS 2003 FIRST QUARTER RESULTS
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                        CLEAN DIESEL TECHNOLOGIES, INC.

                                 BALANCE SHEET

                      (in thousands except share data)
                                                                                                                        
                           
                                                           March 31,   December 31,
                                                                2003           2002
                                                         (Unaudited)               
Assets                                                                             
Current assets:                                                                    
Cash and cash equivalents                                    $ 1,409        $ 2,083
Accounts receivable                                               76            284
Inventories                                                      295            314
Other current assets                                             125             76

Total current assets                                           1,905          2,757

Other assets                                                     285            222

Total assets                                                 $ 2,190        $ 2,979
                                                                                                     

Liabilities and Stockholders' Equity                                               
Current liabilities:                                                               
Accounts payable and accrued expenses                          $ 328          $ 223
     Total current liabilities                                   328            223               

Deferred compensation and pension benefits431                    418               
     Total long term liabilities                                 431            418

Stockholders' Equity:                                                              
Preferred stock, par value $.05 per share, authorized                              
  80,000 shares, no shares issued and outstanding                  -              -
Series A convertible preferred stock, par value $0.05                              
  per share, $500 per share liquidation preference,                                  
  authorized 20,000 shares, no shares issued and                                     
  outstanding                                                      -              -
Common stock, par value $0.05 per share, authorized                                
  15,000,000 shares, issued and outstanding                                          
  11,968,387 and 11,976,903 shares                               598            598
Additional paid-in capital                                    28,519         28,519
Accumulated deficit                                         (27,686)       (26,779)

Total stockholders' equity                                     1,431          2,338

Total liabilities and stockholders' equity                    $2,190        $ 2,979
                                                                                                     
 

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