Stamford, CT - October 1, 2007 - Clean Diesel Technologies, Inc. (EBB: CLDS; AIM: CDT/CDTS; XETRA: CDI), a global company providing innovative technologies and solutions that reduce emissions, conserve fuel and improve engine performance, today announced it has received approval from The NASDAQ Listings Qualifications Department to begin trading on The NASDAQ Capital Market. Effective October 3, 2007, the Company's common stock will begin trading on the more prominent NASDAQ Capital Market. Prior to that, it had been traded in the U.S. on the over-the-counter bulletin board (OTCBB). The Company's common stock will continue to trade on the Alternative Investment Market (AIM) of the London Stock Exchange and in Germany on various regional exchanges and the national electronic exchange (Xetra). Effective with the start of trading on The NASDAQ Capital Market on October 3, 2007, the Company's trading symbol will revert to CDTI from CLDS. Dr. Bernhard Steiner, President and Chief Executive Officer of Clean Diesel Technologies, said, "We are pleased to have received approval for listing on The NASDAQ Capital Market, where our stock will have greater visibility with the investment community and will be accessible to many more sophisticated clean tech, institutional and retail investors. We believe that the transition will enhance trading liquidity in our shares and position Clean Diesel more appropriately and visibly among other leading clean technology companies around the world." About Clean Diesel Technologies Clean Diesel Technologies, Inc., together with its wholly-owned subsidiary, Clean Diesel International, LLC, is a clean energy and environmental technology company that provides innovative solutions to reduce harmful engine emissions and conserve energy. Clean Diesel Technologies' patented technologies, products and solutions enable cost-effective reduction of harmful emissions from internal combustion engines while also improving fuel economy and power. Products include Platinum Plus® fuel-borne catalysts, the Platinum Plus Purifier Systems, the ARIS® urea injection systems for selective catalytic reduction of NOx, diesel particulate filter and biofuels technologies. Their products are in commercial use around the world. Platinum Plus and ARIS are registered trademarks of Clean Diesel Technologies, Inc. For more information, visit Clean Diesel 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 US 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. For further information contact: Clean Diesel Ann Ruple, CFO +1 203 327-7050 Technologies, [email protected] Inc. Abchurch Justin Heath +44 20 7398 7700 Communications Franziska [email protected] (financial press Boehnke enquiries) Matter Jacqueline +1 978-499-9250 x236 Communications Volovich [email protected] (technical press inquiries) The press release can be downloaded from the following link: