Syntroleum Corporation to Host Investor Conference Call

TULSA, Okla., April 20, 2009 (GLOBE NEWSWIRE) -- Syntroleum Corporation
(Nasdaq:SYNM) today announced that the Company will host a conference call for
investors to discuss its first quarter 2009 results.

The conference call will be held on Monday, April 27, 2009, at 2:00 p.m. Central
time (3:00 p.m. Eastern). To participate in the teleconference, investors should
dial (877) 261-8990 about 10 minutes before the start time and reference the
Syntroleum conference call. International callers should dial (847) 619-6441.

About Syntroleum

Syntroleum Corporation owns the Syntroleum(r) Process for Fischer-Tropsch (FT)
conversion of synthesis gas derived from biomass, coal, natural gas and other
carbon-based feed stocks into liquid hydrocarbons, the Synfining(r) Process for
upgrading FT liquid hydrocarbons into middle distillate products such as
synthetic diesel and jet fuels, and the Bio-Synfining(tm) technology for
converting animal fat and vegetable oil feed stocks into middle distillate
products such as renewable diesel and jet fuel. Together with Tyson Foods,
Syntroleum is focused on constructing plants that produce renewable diesel and
jet fuel using inedible fats and greases as feedstock. The 50/50 venture - known
as Dynamic Fuels - was formed to construct and operate multiple renewable
synthetic fuel facilities, with production on the first site beginning in 2010.
The Company plans to use its portfolio of technologies to develop and
participate in synthetic and renewable fuel projects. For additional
information, visit the company's Web site at www.syntroleum.com.

The Syntroleum Corporation logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=5984

This document includes forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995, as well as historical facts.
These forward-looking statements may include statements relating to the
Syntroleum(r) Process, the Synfining(r) Process, our renewable fuels
Bio-Synfining technology, plans to use the Company's various technologies,
commercialization of the Company's technologies, and future investor relations
activities of the Company. When used in this document, the words "anticipate,"
"believe," "estimate," "expect," "intend," "may," "plan," "project," "should"
and similar expressions are intended to be among the statements that identify
forward-looking statements. Although we believe that the expectations reflected
in these forward-looking statements are reasonable, these kinds of statements
involve risks and uncertainties. Actual results may not be consistent with these
forward-looking statements. Syntroleum undertakes no obligation to update or
revise forward-looking statements to reflect changed assumptions, the occurrence
of unanticipated events or changes to future operating results over time.
Important factors that could cause actual results to differ from these
forward-looking statements include the potential that debt or equity financing
for anticipated plants may not be available, the schedule for development,
construction and operation of proposed plants may not be met, anticipated
appropriation and expenditure of federal monies does not occur, commercial-scale
plants do not achieve the same results as those demonstrated on a laboratory or
pilot basis or that such plants experience technological and mechanical
problems, the potential that improvements to Syntroleum's various technologies
currently under development may not be successful, the impact on plant economics
of operating conditions (including energy and feedstock prices), construction
risks, risks associated with investments and operations in foreign countries,
our dependence on strategic relationships with manufacturing and engineering
companies, volatility of energy and feedstock prices, the ability to implement
corporate strategies, including the continued availability of adequate working
capital, competition, intellectual property risks, our ability to obtain
financing and other risks described in the Company's filings with the Securities
and Exchange Commission.

(r) "Syntroleum" is registered as a trademark and service mark in the U.S.
Patent and Trademark Office.

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CONTACT: Syntroleum Corporation
Ron Stinebaugh
(918) 592-7900
www.syntroleum.com