American Power Group Reports Over $500,000 of New Orders; Vehicular Conversions to Be Evaluated by Over Thirty Prospective Customers

LYNNFIELD, MA--(Marketwire - Oct 15, 2012) -  American Power Group Corporation (OTCQB: APGI) announced today that its subsidiary, American Power Group, Inc. ("APG") has received orders for vehicular dual fuel conversions valued at more than $500,000. These orders were received from several certified dealers and customers who intend to install APG's dual fuel system on forty-two heavy-duty trucks. The certified dealers intend to distribute these dual fuel trucks to more than thirty prospective customers so that they may evaluate the costs savings and benefits of APG's V5000 Dual Fuel Turbocharged Natural Gas™ System. Eighteen of these systems were shipped in September with the balance scheduled to be delivered within the next sixty to ninety days.

Lyle Jensen, American Power Group Corporation's President and Chief Executive Officer, stated, "With the eighty-eight EPA Over Useful Life ('OUL') engine family approvals received since May 1, 2012, we are entering the next phase of our production roll-out. The forty-two trucks in this most recent order will be evaluated by fleet owners who operate fleets ranging from hundreds to thousands of trucks. Because the units ordered encompass both CNG and LNG configurations, we are looking forward to receiving important feedback from fleet operators who return to a home base daily as well as long haul routes."

Mr. Jensen further commented, "We are working to complete all remaining EPA OUL emission testing in the next few months, to bring our total to approximately two hundred OUL engine families, representing a multi-million dollar market opportunity. Concurrently, we have begun our Intermediate Age (IUL) testing at the University of Houston Diesel Test Center and anticipate completing our first IUL test within the next 60 days. We believe APG's aftermarket dual fuel technology is the key stepping stone for thousands of fleet owners to gain the economic benefits of the price spread between diesel fuel and natural gas while also enjoying the flexibility and comfort level of diesel-like performance."

About American Power Group Corporation
American Power Group's alternative energy subsidiary, American Power Group, Inc., provides a cost-effective patented Turbocharged Natural Gas™ conversion technology for aftermarket 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: www.americanpowergroupinc.com.

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, 2011 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.