STWA Issues Letter to Shareholders

SANTA BARBARA, CA--(Marketwire - Dec 13, 2011) - STWA, Inc. (OTCBB: ZERO) ("STWA" or the "Company"), a developer of energy efficiency technologies in the multi-billion dollar oil pipeline and diesel engine markets, today announced the Company has issued a Letter to Shareholders.

The letter highlights recent developments at STWA specific to the U.S. Department of Energy's findings proving that STWA's Applied Oil Technology (AOT™) increases pipeline efficiencies by over 13%. In the letter, the Company further outlines its current priorities including:

1) Quantifying how this 13% increase in energy efficiency translates into enormous savings and more income for the oil industry while reducing greenhouse gas emissions.

2) Continuing productive discussions with potential future customers in the oil pipeline industry and gathering their input for the second generation commercial prototype.

3) Developing a second generation commercial prototype and testing it with pre-selected entities to confirm revenue proof-of-concept, data, and results.

To read the Letter to Shareholders in full, please visit: http://www.stwa.com/STWA/investor/120711_STWA_ShareholderLetter_FINAL.pdf

About STWA, Inc.

STWA, Inc. (OTCBB: ZERO) develops and commercializes energy efficiency technologies that assist in meeting increasing global energy demands, improving the economics of oil extraction and transport, and reducing greenhouse gas emissions. The Company's intellectual property portfolio includes 24 domestic and international patents and patents pending, which have been developed in conjunction with Temple University. STWA's technologies include Applied Oil Technology (AOT™) which improves oil flow through pipelines. AOT™ has been proven in U.S. Department of Energy tests to increase the energy efficiency of oil pipeline pump stations by over 13%. ELEKTRA™ improves diesel engine efficiency for industrial diesel engines, as well as diesel-powered trucks, trains, marine vessels, military fleets and jet turbines. More information including a company Fact Sheet, logos and media articles are available at: http://www.stwa.com.

Safe Harbor Statement

This press release contains information that constitutes forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Any such forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from any future results described within the forward-looking statements. Risk factors that could contribute to such differences include those matters more fully disclosed in the Company's reports filed with the Securities and Exchange Commission. The forward-looking information provided herein represents the Company's estimates as of the date of the press release, and subsequent events and developments may cause the Company's estimates to change. The Company specifically disclaims any obligation to update the forward-looking information in the future. Therefore, this forward-looking information should not be relied upon as representing the Company's estimates of its future financial performance as of any date subsequent to the date of this press release.