Utilimaster(R) Corporation and BAF Technologies Announce Preferred and Exclusive Installer Agreement

Utilimaster(R) Corporation and BAF Technologies Announce Preferred and
Exclusive Installer Agreement

BRISTOL, Ind., March 7, 2013 (GLOBE NEWSWIRE) -- Utilimaster Corporation, a
subsidiary of Spartan Motors, Inc. (Nasdaq:SPAR), along with BAF Technologies,
a wholly owned subsidiary of Clean Energy Fuels Corp. (Nasdaq:CLNE), announced
today the formation of a preferred installer agreement between the two
companies. Together, Utilimaster and BAF will be presenting a converted
vehicle in the Ford Commercial Truck booth (Booth #3139) at the 2013 NTEA Work
Truck Show in Indianapolis, Ind., March 6-8.

Under the agreement, Utilimaster, a market leader in delivery and service
vehicles, is appointed the exclusive and preferred installer of the BAF
Compressed Natural Gas system on the Ford F-59 walk-in van stripped chassis.
The solution achieved both EPA and CARB certifications.

BAF, a leading provider of natural gas vehicle systems in the United States
and supports clients with alternative fuel systems, has collaborated with
Utilimaster to develop a dedicated solution to support the delivery and
service markets. This partnership builds on the Utilimaster strategic vision
of offering a full portfolio of alternate fuel and field service solutions.

"Alliances with companies like BAF Technologies provides Utilimaster clients
with a professional partnership of project management, engineering and fleet
solutions while positioning Utilimaster for long term growth," said John
Forbes, President, Utilimaster Corporation. "The agreement further extends our
commitment to offer green solutions that are field-proven and deliver a strong
return on investment."

Compressed Natural Gas equipped vehicles provide a 65% fuel savings while
utilizing natural gas, 90% of which is produced domestically.

Utilimaster has a proprietary alternative fuels program offering that assesses
customer needs, formulates the best solution, develops the business case,
manages the deployment project plan, and provides product training/support.
Customers also have the option of calling upon the Utilimaster Fleet Solutions
Organization to implement additional programs – at any location – that have
proven to be best practices in the areas of improved driver productivity,
safety, and reduction of cost of operation.

Spartan Motors' business strategy is embodied in The Spartan DRIVE Plan. It is
a five-point plan that is represented by the acronym D.R.I.V.E.

D.R.I.V.E.

  *Diversified Growth
  *Redefining Technology and Innovation, Develop Exciting Products Value
  *Integration of the Enterprise to Achieve Operational Improvement
  *Vibrant Culture
  *Extend Our Core Markets

Building on this plan, DRIVE encourages heightened focus, teamwork and a
common approach. It will align associate efforts and emphasize the importance
of both collaboration and integration across business units. This strategy
will enable diversification and limit exposure to industry cyclicality.

About Utilimaster

Utilimaster, a subsidiary of Spartan Motors, Inc. (Nasdaq:SPAR), is a leading
manufacturer of walk-in vans and commercial truck bodies for the delivery and
service marketplace. Utilimaster designs, develops and manufactures products
to customer specifications for use in the package delivery, one-way truck
rental, bakery/snack delivery, utility and linen/uniform rental businesses.
The company serves a diverse customer base and also sells aftermarket parts
and accessories. Visit Utilimaster at www.utilimaster.com.

About Spartan Motors

Spartan Motors, Inc., designs, engineers and manufactures specialty chassis,
specialty vehicles, truck bodies and aftermarket parts for the recreational
vehicle, emergency response, government services and defense, delivery and
service markets. The company's brand names - Spartan™, Spartan ERV™ and
Utilimaster® - are known for quality, performance, service and first-to-market
innovation. The company employs approximately 1,700 associates at facilities
in Michigan, Pennsylvania, South Dakota, Indiana, Florida and Texas. Spartan
reported sales of $426 million in 2011 and is focused on becoming a global
leader in the design, engineering and manufacture of specialty vehicles and
chassis. Visit Spartan Motors at www.spartanmotors.com.

About BAF Technologies

BAF Technologies is the leading provider of natural gas vehicle systems in the
United States and supports clients with alternative fuel systems. Founded in
1992 and headquartered in Dallas, Texas, BAF was acquired by Clean Energy
Fuels Corp. (Nasdaq:CLNE) in October 2009. BAF's alternative fuel vehicle
up-fitting capabilities include aftermarket compressed natural gas (CNG)
conversions of Ford-manufactured vans, cutaway shuttles, taxis, pick-ups and
light-duty trucks. Visit www.BAFtechnologies.com.

CONTACT: Russell Chick
         Corporate Director of Marketing
         Spartan Motors, Inc.
         517.997.3852
        
         John Marshall
         Senior Vice President, Sales and Marketing
         Utilimaster Corporation
         574.848.2004