CDTi Receives Expanded CARB Verification for Key Emission Control System

CDTi Receives Expanded CARB Verification for Key Emission Control System

VENTURA, Calif., Nov. 6, 2012 (GLOBE NEWSWIRE) -- Clean Diesel Technologies,
Inc. (Nasdaq:CDTI) ("CDTi"), a cleantech emissions control company, is pleased
to announce that it has received an expanded verification from the California
Air Resources Board (CARB) for its innovative ECS-branded Purifilter® Plus M
diesel particulate filter (DPF) emission reduction system. Purifilter® Plus M
features CDTi's proprietary MPC® catalyst technology, which is produced at its
Oxnard, California facility. Purifilter® Plus M is the only hybrid DPF system
employing both passive and active regeneration that CARB and the Environmental
Protection Agency (EPA) have verified for use in their engine retrofit

Purifilter® Plus M combines the benefits of self-regenerating DPF technology
with electrical elements that periodically perform active regeneration –
ensuring consistent filtration efficiency and equipment uptime. This
combination of passive and active regeneration greatly reduces the maintenance
requirements when compared to traditional passive DPF solutions.

The expanded verification of Purifilter® Plus M enables CDTi to retrofit an
important segment of the California fleets previously not available. The
verification includes key 1994 to 2010 on-road Class 7 and Class 8 heavy duty
diesel vehicles equipped with and without exhaust gas recirculation (EGR)
engines which are subject to mandatory retrofit requirements. These vehicles
may include school, shuttle and urban buses; municipal, state and utility
fleet vehicles; refuse trucks; and urban delivery vehicles, all of which are
candidates for the current CARB Truck and Bus Regulation — a mandatory program
established to meet federally imposed clean air standards and to reduce the
adverse health effects from truck and bus pollution.

CDTi offers the largest combined portfolio of EPA- and CARB-verified diesel
retrofit solutions, with additional products currently in the evaluation
process. CDTi believes that with the anticipated receipt of additional
verifications, its extensive retrofit experience and large distributor network
it will be well positioned to address market opportunities, including the
current California opportunity.

About CDTi

CDTi is a vertically integrated global manufacturer and distributor of
emissions control systems and products, focused on the heavy duty diesel and
light duty vehicle markets. CDTi utilizes its proprietary patented Mixed Phase
Catalyst (MPC®) technology, as well as its ARIS® selective catalytic
reduction, Platinum Plus® fuel-borne catalyst, and other technologies to
provide high-value sustainable solutions to reduce emissions, increase energy
efficiency and lower the carbon intensity of on- and off-road engine
applications. CDTi is headquartered in Ventura, California and currently has
operations in the U.S., Canada, U.K., France, Japan and Sweden. For more
information, please visit

The CDTi logo is available at

Forward-Looking Statements Safe Harbor
Certain statements in this news release, such as statements regarding future
verifications and the size and scope of regulatory schemes and their impact on
our business 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 CDTi's
filings with the U.S. Securities and Exchange Commission, uncertainties and
other factors that may cause the actual results, performance or achievements
of CDTi 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. CDTi assumes no obligation to update
the forward-looking information contained in this release.

CONTACT: Kristi Cushing, Investor Relations Manager
         Tel:  +1 (805) 639-9555

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