Syntroleum’s (SYNM) 2012 Earnings and Dynamic Fuels Plant Update Conference Call

TULSA, Okla., March 14, 2013 (GLOBE NEWSWIRE) — Syntroleum Corporation (Nasdaq:SYNM) today announced the Company will host a conference call for investors to discuss its 2012 results and to update the status of the Dynamic Fuels Geismar Plant.

The conference call will be held on Monday, March 18, 2013, at 2:00 p.m. Central time (3:00 p.m. Eastern). A webcast of the call will be available via the Internet by accessing www.syntroleum.com. Listeners should allow a few minutes for registration into the web site. To participate in the teleconference, investors should dial 1-877-317-6789 about 10 minutes before the start time and reference the Syntroleum conference call. International callers should dial 1-412-317-6789. A replay of this conference call will be available on the web site under the Syntroleum Investor Relations tab.

For additional information see the Company’s Form 10-K for the year ended December 31, 2012, to be filed with the SEC on Friday, March 15, 2013. The 10-K will be available through the Investor Relations section of the Company’s Web site, www.syntroleum.com on March 15, 2013.

About Syntroleum

Syntroleum Corporation owns the Syntroleum® Process for Fischer-Tropsch (FT) conversion of synthesis gas derived from biomass, coal, natural gas and other carbon-based feedstocks into liquid hydrocarbons, the Synfining® Process for upgrading FT liquid hydrocarbons into middle distillate products such as synthetic diesel and jet fuels, and the Bio-Synfining® technology for converting animal fat and vegetable oil feedstocks into middle distillate products such as 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 fuels 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® Process, the Synfining® Process, our renewable fuels Bio-Synfining® technology, plans to use the Company’s various technologies, operational activities of the Company, commercialization of the Company’s technologies, certification of Fischer-Tropsch and renewable fuels, performance and use of Syntroleum’s cobalt catalyst, and performance and use of fuels derived from the Syntroleum® Process and technology test results. 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 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 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.

® “Syntroleum”, “Synfining”, and “Bio-Synfining” are registered as trademarks and service marks in the U.S. Patent and Trademark Office.

CONTACT: Ron Stinebaugh
         Syntroleum Corporation
         (281) 224-9862
         www.syntroleum.com