American Power Group Receives Approval for Additional OUL Vehicular Engine Family Applications; Total Approvals Now at 110

American Power Group Receives Approval for Additional OUL Vehicular Engine 
Family Applications; Total Approvals Now at 110 Engine
LYNNFIELD, MA -- (Marketwire) -- 03/04/13 --   American Power Group
Corporation (OTCQB: APGI), announced today that its subsidiary,
American Power Group, Inc. ("APG"), has received online notification
from the U.S. Environmental Protection Agency ("EPA") that its recent
Clean Alternative Fuel Vehicle and Engine Conversion Submission for
an additional 22 engine families has been approved for the following
additional Outside Useful Life ("OUL") engines: 

--  Cummins ISX (2009 - 2007)
--  Cummins ISM (2009 - 2007)
--  Caterpillar C-15 (1997 - 1996)
--  Caterpillar C-16 (1997)

The submission utilized APG's latest V5000 Dual Fuel Turbocharged
Natural Gas(TM) technology which is required to meet specific design,
componentry, and emission compliance criteria per the EPA Final Rule
40CFR Parts 85 and 86.  
Lyle Jensen, American Power Group Corporation's President and Chief
Executive Officer, stated, "This round of approvals mark the
completion of the Class 8 EPA OUL testing for the most popular
Cummins and Detroit Diesel engine families for model years 2009 to
2002 and the most popular Caterpillar engine families from 2006 to
1996. Caterpillar exited the vehicular engine market after 2006. The
EPA OUL testing for the Volvo and Mack engine families has begun and
we anticipate testing and approvals to be completed within the next
60 to 90 days. Following that, we will wrap up our EPA OUL testing
with selected engine models older than model year 2002 for the
re-manufactured engine conversion market and the International DT
466/MaxxForce engine series. Since May 2012, we have received
approval on over one hundred EPA OUL engine families and anticipate
having over two hundred OUL engine families approved when we complete
this phase of testing later this spring which would open up an
estimated domestic multi-billion dollar OUL addressable market of
500,000 vehicles."  
Mr. Jensen added, "We also have begun our EPA Intermediate Useful
Life ('IUL') testing at the University of Houston Diesel Testing And
Research Center for the lower mileage Class 8 trucks that utilize
either the catalytic convertor or selective catalyst reduction
emission technology. Progress is steady and we expect most of the
popular IUL engine family approvals will be completed during the
calendar year representing an estimated additional 400,000 potential
vehicles for dual fuel conversion. This timeline aligns itself nicely
with our recently announced national roll-out of WheelTime Network
certified installers which will occur during calendar year 2013."  
About American Power Group Corporation
 American Power Group's
alternative energy subsidiary, American Power Group, Inc., provides a
cost-effective patented Turbocharged Natural Gas(TM) conversion
technology for vehicular, stationary and off-road mobile diesel
engines. American Power Group's dual fuel technology is a unique
non-invasive energy enhancement system that converts existing diesel
engines into more efficient and environmentally friendly engines that
have the flexibility to run on: (1) diesel fuel and liquefied natural
gas; (2) diesel fuel and compressed natural gas; (3) diesel fuel and
pipeline or well-head gas; and (4) diesel fuel and bio-methane, with
the flexibility to return to 100% diesel fuel operation at any time.
The proprietary technology seamlessly displaces up to 80% of the
normal diesel fuel consumption with the average displacement ranging
from 40% to 65%. The energized fuel balance is maintained with a
proprietary read-only electronic controller system ensuring the
engines operate at original equipment manufacturers' specified
temperatures and pressures. Installation on a wide variety of engine
models and end-market applications require no engine modifications
unlike the more expensive invasive fuel-injected systems in the
market. See additional information at: 
Caution Regarding Forward-Looking Statements and Opinions
 With the
exception of the historical information contained in this release,
the matters described herein contain forward-looking statements and
opinions, including, but not limited to, statements relating to new
markets, development and introduction of new products, and financial
and operating projections. These forward-looking statements and
opinions are neither promises nor guarantees, but involve risk and
uncertainties that may individually or mutually impact the matters
herein, and cause actual results, events and performance to differ
materially from such forward-looking statements and opinions. These
risk factors include, but are not limited to, results of future
operations, difficulties or delays in developing or introducing new
products and keeping them on the market, the results of future
research, lack of product demand and market acceptance for current
and future products, adverse events, product changes, the effect of
economic conditions, the impact of competitive products and pricing,
governmental regulations with respect to emissions, including whether
EPA approval will be obtained for future products and additional
applications, the results of litigation, factors affecting the
Company's future income and resulting ability to utilize its NOLs,
and/or other factors, which are detailed from time to time in the
Company's SEC reports, including the report on Form 10-K for the year
ended September 30, 2012 and the Company's quarterly reports on Form
10-Q. Readers are cautioned not to place undue reliance on these
forward-looking statements and opinions, which speak only as of the
date hereof. The Company undertakes no obligation to release publicly
the result of any revisions to these forward-looking statements and
opinions that may be made to reflect events or circumstances after
the date hereof or to reflect the occurrence of unanticipated events. 
Media Information Contact: 
Kim Doran 
Quixote Group 
Investor Relations Contacts: 
Chuck Coppa
American Power Group Corporation
John Nesbett or Jennifer Belodeau
Institutional Marketing Services (IMS)
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