SANTA BARBARA, CA--(Marketwire - Apr 19, 2011) - STWA, Inc. (OTCBB: ZERO) ("STWA" or the "Company"), an innovative company creating technology focused on energy efficiency of large-scale energy production and improved fuel economy for diesel fleets, issued an investor newsletter update on the upcoming Phase II testing of its Applied Oil Technology (AOT™) for crude oil viscosity reduction at the U.S. Department of Energy's (DOE) Rocky Mountain Oilfield Testing Center (RMOTC) in mid- April.

The newsletter update provides a summary and overview of AOT™'s value proposition to the pipeline industry as well as its potential cost savings. Pictured in the newsletter is the first ever image of a full-scale working AOT™ prototype co-developed with Colfax Corporation and a photograph of testing equipment at the RMOTC facility. A link to the investor update can be found at: http://www.stwa.com/STWA/whitepapers/STWA_Investor_Newsletter_Update_4_2011.pdf

AOT™ utilizes patented processes to treat crude oil to reduce interparticulate resistance and drag in pipeline networks. As treatment is deployed, resistance decreases and flow increases in an efficient and cost-effective manner. The process has been proven in laboratory tests to reduce crude oil's viscosity. The Company's findings show pipeline market technology is poised for significant growth and that there are approximately 400,000 miles of crude oil pipeline in operation around the globe that could potentially benefit from the application of its AOT™ technology.

About STWA, Inc.

STWA, Inc. (OTCBB: ZERO) is an innovative company creating technology focused on energy efficiency of large-scale energy production and improved fuel economy for diesel fleets. The Company's Patented and Patent Pending technologies, including AOT™ (Applied Oil Technology), under development with Temple University, and ELEKTRA™ (for Improved Diesel Engine Efficiency), provide efficient and cost-effective means of improving the efficacy of crude oil transport and diesel engine efficiency to assist in meeting global increasing energy demands and emission quality standards. Applications include: (AOT™) Crude oil extraction & delivery systems, including oil platforms, oil fields and pipeline transmission systems. (ELEKTRA™) Diesel 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.