American Power Group Appoints Steve Majkowski Vice President of Sales and Marketing

LYNNFIELD, MA--(Marketwire - Dec 13, 2012) - American Power Group Corporation (OTCQB: APGI) announced today that its subsidiary, American Power Group, Inc. ("APG") has appointed Steve Majkowski Vice President of Sales and Marketing reporting directly to Lyle Jensen, CEO. He will be responsible for establishing, directing, and leading all customer-oriented initiatives to grow APG's domestic and international dual fuel conversion businesses.

Mr. Majkowski has had a progressive 20-year career with both Delphi Automotive and Dow Chemical's Automotive Systems, working on a broad range of powertrain areas, including engine calibration and software development, diesel and gasoline fuel systems and components, and exhaust after treatment. At Delphi he was recognized with the "Boss" Kettering Award, is a member of the Delphi Innovation Hall of Fame and holder of nine U.S. patents. His work experience includes automotive engineering, global marketing, operations, and product line sales and marketing. Mr. Majkowski graduated with a BS in Mechanical Engineering from Michigan State University and received his MBA degree from Kettering University.

Lyle Jensen, CEO, commented, "We are very pleased to have a high caliber executive such as Steve join the APG Team to lead our sales and marketing initiatives. Since May 2012, APG has received eighty-eight vehicular EPA Over Useful Life (OUL) engine family approvals and we are confident that Steve's expertise will enable us to focus our sales and marketing initiatives to aggressively target the fleet owners who will benefit from our dual fuel conversion upgrades. As we expand our approved vehicular and stationary product offerings we will look to Steve and his sales team to help APG further accelerate our market leadership position."

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 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.