American Power Group Announces 100 Percent Participation by

LYNNFIELD, MA--(Marketwired - May 9, 2013) -  American Power Group Corporation ( OTCQB : APGI ) announced today that all eighteen WheelTime Network, LLC ("WheelTime") member companies have become APG Authorized Dealers and will begin to create a full-service network including sales, certified installation, warranty diagnostics and post-install maintenance for APG's CNG and LNG dual-fueled vehicular conversions. This collaboration supports the previously announced National Distributor and Master Marketing Agreement under which WheelTime agreed to endorse APG's technology and engage their eighteen independently-owned member companies to establish a North American network to market APG's Turbocharged Natural Gas™ systems. 

Lyle Jensen, CEO of American Power Group, stated, "When combined with our other regional partners, the WheelTime relationship provides us with an unparalleled full-service authorized dealer and installer network across the United States and Canada that would have taken many years and millions of dollars to create on our own. This strategic marketing and operational milestone elevates APG's competitive advantage to create scalability on a national level with an integrated approach focused on consistent quality and reliability."

Mr. Jensen added, "Now that everyone is on board, we have begun our vehicular sales training with key regional sales training sessions scheduled for May and June. One of the WheelTime member locations in the Western region is already certified and has supported twelve 'early-adopter conversions' for numerous customer validations. We anticipate having multiple certified installer locations operating in many major regional markets by calendar year-end as they make the necessary facility upgrades to meet local fire marshal requirements for sales and service of natural gas vehicles. With approximately 200 locations across North America, we have a scalable footprint to handle all anticipated growth phases as the heavy-duty truck industry begins to evolve into full adoption of natural gas vehicles." 

The WheelTime Network is North America's highest quality truck service network. Its eighteen member companies provide installation and warranty support through nearly 200 service centers, 2,800 service bays, 3,000 factory-trained technicians and 30 training facilities located across the United States and Canada. WheelTime's premier repair and maintenance service management program that ensures customers receive consistent levels of service and consistent hours of labor per repair or service regardless of the WheelTime Network location.

The WheelTime Network LLC member companies in alphabetical order are: Atlantic Detroit Diesel-Allison, Central Power Systems and Services, Clarke Power Services, Cullen Diesel Power, Florida Detroit Diesel-Allison, Inland Power Group, Interstate Power Systems, Johnson & Towers, New England Detroit Diesel-Allison, Pacific Power Products, Penn Commercial Vehicle Solutions, Smith Power Products, Stewart & Stevenson, United Engines, Valley Power Systems, W.W. Williams, Wajax Power Systems and Western Branch Diesel.

About WheelTime Network LLC Established in 2004 as a strategic alliance among all North American Detroit Diesel-Allison distributors, the founding goal of the WheelTime Network was to adopt and implement a common set of quality metrics that would help members monitor and continually enhance specific service performance criteria as defined by their customers. Each WheelTime member is an equity owner in the Network and has a vested interest in achieving WheelTime's exclusive truck repair service metrics and standards. Over $11 million in systems and staffing resources has been invested by the 18 member Network to create and manage systems and metrics that enhance repair quality, service consistency and customer satisfaction on all-makes of truck repairs. In addition to more than 30 training facilities and more than 200 service centers located across the U.S., Canada and Australia, WheelTime members also offer mobile repair services and on-site truck care through more than 1,500 service vehicles. WheelTime strives to be easy to do business with while remaining focused on speed and customer priorities as it drives toward delivery of a consistent experience everywhere. For more information about WheelTime, or to find the nearest service location, log on to: WheelTime.com .

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, 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.