Clean Energy and Mansfield Partner to Provide Fully Integrated Natural Gas Fueling Solution

  Clean Energy and Mansfield Partner to Provide Fully Integrated Natural Gas
  Fueling Solution

     Clean Energy to Acquire Mansfield CNG Fuel Infrastructure Portfolio

Business Wire

SEAL BEACH, Calif. & GAINESVILLE, Ga. -- May 7, 2013

Clean Energy Fuels Corp. (Nasdaq: CLNE) and Mansfield Energy Corp. today
announced a strategic partnership to offer customers the most comprehensive
solution in the compressed natural gas (CNG) fuel industry. Sales teams from
both companies will offer Clean Energy’s natural gas fueling station
construction and operational services to current and potential customers.
These services will be supported by Mansfield’s large-scale fuel supply
capabilities and Gas-2-Gallons fuel management system, creating a superior
solution for the growing number of fleets making the switch to cleaner,
cheaper natural gas.

“This agreement joins two leaders of fleet fueling into strategic partners
that will provide the highest level of service and best value for customers in
the rapidly growing natural gas fuel market,” said Andrew J. Littlefair,
president and CEO of Clean Energy. “No other company offers fuel customers the
benefit of scale and expertise that Mansfield provides. Clean Energy has built
and operated more CNG stations and fueled more natural gas vehicles than any
company in the U.S. Together, we will be the best solution in the

“We want our customers to have the best solution possible for fueling with
natural gas,” said Michael Mansfield, CEO of Mansfield. “We bring scale in
commodity supply, risk management, and transaction processing. Clean Energy
has scale in design, engineering, and operations. Bringing these strengths
together for our customers provides the benefits of proven technology coupled
with large scale operating efficiencies to provide the best value and simplest
path to natural gas adoption in the market today.”

Mansfield Gas Equipment Systems has ongoing CNG service and operations
contracts with 43 locations as well as 20 new CNG sites currently under
development in the waste, transit, and municipal fleet sectors. This portfolio
will be combined with the 348 CNG and liquefied natural gas (LNG) fueling
stations Clean Energy currently owns, operates, or supplies, further
solidifying Clean Energy’s position as the largest provider of natural gas
infrastructure for transportation in North America. Clean Energy’s total
strategic partnerships to-date represent over 11 billion gallons of gasoline
and diesel delivered annually. The company also will become the Western
distributor of Mansfield Gas Equipment Systems’ FuelMaker, a small scale
business and home re-fueling system.

Natural gas fuel costs up to $1.50 less per gallon than gasoline or diesel,
depending on local market conditions. The use of natural gas fuel not only
reduces operating costs for vehicles, but also reduces greenhouse gas
emissions up to 30% in light-duty vehicles and 23% in medium to heavy-duty

For more information, please refer to the attached fact sheet or visit

About Clean EnergyFuels Corp.

Clean Energy Fuels Corp. (Nasdaq: CLNE) is the largest provider of natural gas
fuel for transportation in North America. We build and operate compressed
natural gas (CNG) and liquefied natural gas (LNG) fueling stations;
manufacture CNG and LNG equipment and technologies for ourselves and other
companies; convert taxis, vans, pick-up trucks, and shuttle buses to natural
gas; and develop renewable natural gas (RNG) production facilities. For more

About Mansfield Oil Company

Ranked as one of the Top 100 privately held companies in America by Forbes
magazine, Mansfield defines the next generation transportation fuels company.
Founded in 1957, the company has achieved double-digit growth for three
decades by focusing on optimizing and controlling fuel-related costs for its
customers using innovation, technology, and high touch service. Mansfield’s
corporate headquarters is located in Gainesville, GA, with regional operations
centers located in Chicago, Detroit, Denver, Los Angeles, Houston, and
Calgary, and with renewable energy operations in Bloomington, MN; Irvine, CA;
and Sioux City, IA. For more information,

Forward-Looking Statements — This news release contains forward-looking 
statements within the meaning of Section 27A of the Securities Act of 1933 and
Section 21E of the Securities Exchange Act of 1934 that involve risks,
uncertainties, and assumptions, including statements about the anticipated
benefits of the strategic partnership, the advantages of natural gas relative
to gasoline and diesel fuel, future sales of Clean Energy’s and Mansfield’s
products and services, and expectations about the future adoption of natural
gas as a vehicle fuel. Actual results and the timing of events could differ
materially from those anticipated in these forward-looking statements as a
result of several factors, including, but not limited to, changes in the price
per gallon of natural gas fuel relative to diesel and gasoline, lack of demand
for Clean Energy’s and Mansfield’s products and services, and changes in
governmental regulations. The forward-looking statements made herein speak
only as of the date of this press release and, unless otherwise required by
law, the company undertakes no obligation to publicly update such
forward-looking statements to reflect subsequent events or circumstances.
Additionally, the reports and other documents Clean Energy files with the SEC
(available at contain risk factors, which may cause actual
results to differ materially from the forward-looking statements contained in
this news release.

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Clean Energy Fuels Investor Contact:
Tony Kritzer
Director, Investor Relations
Clean Energy Fuels Media Contact:
Patric Rayburn
Public Relations Manager
Mansfield Media Contact:
Kristin Sanderson
Corporate Marketing Manager
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