SecProbe.io

April 4, 2013

Andrew J. Littlefair
President and Chief Executive Officer
Clean Energy Fuels Corp.
3020 Old Ranch Parkway, Suite 400
Seal Beach, California 90740

Re: Clean Energy Fuels  Corp.
  Registration Statement on Form S-3
Filed  March 6, 2013
  File No.  333-187085

Dear Mr. Littlefair :

We have limited our review of your registration statement to those issues we have
addressed in our comments.  In  some of our comments, we may ask you to provide us with
information so we may better understand your disclosure.

Please respond to this letter by amending your registration statement and providing the
requested information .  Where you do not believe our comments apply to your facts and
circumstances or do not believe an amendment is appropriate, please tell us why in your
response.

After reviewing any amendment to your registration statement and the information you
provide in response to these  comments , we may have  additional comments.

General

1. To the extent applicable, please amend your post -effective amendment no. 3 to Form S -3
(file no. 333 -168433) filed on March 6, 2013 to reflect the revisions requested by this
letter.

Risk Factors

2. We note tha t your stock price has experienced volatility relative to other reporting
companies in your industry.  Please include a risk factor to disclose this volatility.

We urge all persons who are responsible for the accuracy and adequacy of the disclosure
in the  filing to be certain that the filing includes the information the Securities Act of 193 3 and
all applicable Securities  Act rules require.   Since the company and its management are in
possession of all facts relating to a company’s disclosure, they are res ponsible for the accuracy
and adequacy of the disclosures they have made.

Andrew J. Littlefair
Clean Energy Fuels Corp.
April 4, 2013
Page 2

Notwithstanding our comments, in the event you request acceleration of the effective date
of the pending registration statement please provide a written statement from the company
acknowledging that:

 should the Commission or the staff, acting pursuant to delegated authority, declare the
filing effective, it does not foreclose the Commission from taking any action with respect
to the filing;

 the action of the Commission or the staff, acting pursuant to delegated authority, in
declaring the filing effective, does not relieve the company from its full responsibility for
the adequacy and accuracy of the disclosure in the filing; and

 the company  may not assert staff comments and the declaration of effectiveness as a
defense in any proceeding initiated by the Commission or any person under the federal
securities laws of the United States.

Please refer to Rules 460 and 461 regarding requests for  acceleration .  We will consider a
written request for acceleration of the effective date of the registration statement as confirmation
of the fact that those requesting acceleration are aware of their respective responsibilities under
the Securities Act o f 1933 and the Securities Exchange Act of 1934 as they relate to the proposed
public offering of the securities specified in the above registration statement.  Please allow
adequate time  for us to review any amendment prior to the requested effective date of the
registration statement.

Please contact Charles Lee , Staff Attorney,  at (202) 551 -3427, Lilyanna Peyser , Special
Counsel,  at (202) 551 -3222 , or me at (202) 551 -3720  with any questions.

Sincerely,

 /s/ Lilyanna L. Peyser for

Mara L. Ransom
Assistant Director

cc: Nate Jensen
 Clean Energy Fuels Corp.

 Andrew Thorpe
Morrison & Foerster LLP