Third Party Confirmation of Sonex Emissions Reduction

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For Immediate Release

Third Party Confirmation of Sonex Emissions Reduction

MARYLAND, ANNAPOLIS, Nov. 20 -/E-Wire/-- SONEX RESEARCH, INC. (OTC BB: SONX) announced the receipt of a report by Ricardo Consulting Engineers Ltd of Shoreham, England, that confirms the soot reduction capability of the Sonex Combustion System (SCS) in a truck diesel engine.

Ricardo is one the world's leading engine engineering and powertrain consulting firms to the automotive industry.

Earlier this year Sonex had announced the start of a test program by one of the world's leading independent engine R&D; and testing firms to evaluate the SCS "Low Soot' design in a turbo-charged and intercooled six-cylinder, direct injected diesel engine used in medium-duty trucks.

It was announced that pre-production SCS pistons for the tests were to be fabricated by Federal-Mogul Corp., a major international supplier of engine components that has had a relationship with Sonex for several years. At the time, Sonex was unable to provide the names of the engine R&D; firm and the sponsoring foreign diesel engine manufacturer due to secrecy restrictions.

Ricardo has now consented to the disclosure of its role in the program.

Ricardo reports that the engine operating with the SCS piston at the best injection timings emitted up to 45% less soot than the stock engine at a constant NOx (oxides of nitrogen) level corresponding to Euro 2, with similar fuel consumption. Ricardo plans to publish the findings in a technical paper to be submitted to the Society of Automotive Engineers in the spring of 2002.

Dr. Andrew A. Pouring, CEO and founder of Sonex, said the Company is very pleased to announce the first independent third party confirmation of the emissions reduction capability of the patented SCS. "We are excited by this public affirmation by Ricardo, a world renowned and highly respected leader in the automotive technology realm, which confirms the potential resulting from our years of effort to advance the SCS technology', said Dr. Pouring. "These third party results will permit the Company to market its technology more aggressively.'

The engine manufacturer is now evaluating the program results before deciding on how to proceed. Federal-Mogul, however, which recently filed for bankruptcy protection, has informed the Company that it is focusing its limited resources on core businesses and will no longer participate in SCS research.

Sonex plans to turn its attention to other piston suppliers who have evaluated earlier SCS designs.

Sonex reports that progress is continuing on a second program begun this spring by another foreign engine manufacturer for technology transfer of the Company's new Stratified Charge Radical Ignition (SCRI) combustion technology to a modern, advanced, multi-cylinder, medium-duty truck diesel engine that employs all of the latest diesel engine technology such as a high pressure, common rail, electronically controlled injection system, and turbo-charging.

The SCRI combustion technology enables practical application of homogeneous charge compression ignition (HCCI), a process that, in theory, can lower emissions while also achieving reduced fuel consumption.

Compression ignition does not require the use of a spark plug; however, the lack of a method for controlling the ignition point has prevented practical implementation of HCCI. With the SCRI, Sonex believes it has attained the control of ignition that will make HCCI viable for commercial application.

The newer SCRI design also reduces NOx emissions as well as soot, significant because NOx is the most difficult pollutant for diesel engine manufacturers to reduce.

The potential of this type of combustion is gaining increased acceptance in the industry. Late in November Dr. Pouring will present a Sonex paper on the SCRI at an international symposium of combustion engineers in France, sponsored by the French Petroleum Institute, that will focus exclusively on HCCI, or CAI (controlled auto-ignition) as it is also known in Europe.

Sonex Research, Inc., a leader in the field of combustion technology, has its SCS technology protected by numerous patents issued and pending worldwide.

The Company is pursuing licensing agreements for the marketing, manufacture and sale of diesel truck engine pistons incorporating its patented technology for the reduction of emissions in vehicular direct injected turbocharged diesel engines, and has conducted demonstration and development programs with some of the world's largest diesel engine manufacturers.

Other SCS designs are being used to convert small gasoline engines to heavy fuel use for military and commercial applications.

Caution Regarding Forward-Looking Statements

This announcement, as well as all publicly disseminated material about the Company, contains information in the form of "forward-looking' statements within the meaning of the Private Securities Litigation Act of 1995 (the "Act').

Such statements are based on current expectations, estimates, projections and assumptions by management with respect to, among other things, trends affecting the Company's financial condition or results of operations and the impact of competition.

Such statements are not guarantees of future performance and involve risks and uncertainties, all of which are difficult to predict and many of which are beyond the control of the Company.

In order to obtain the benefits of the "safe harbor' provisions of the Act for any such forward-looking statements, the Company cautions shareholders, investors and prospective investors about significant factors which, among other things, have in some cases affected the Company's actual results and are in the future likely to affect the Company's actual results and cause them to differ materially from those expressed in any such forward-looking statements.

Accordingly, readers are cautioned not to place undue reliance on such forward-looking statements.

Shareholders, investors and prospective investors should read this announcement in conjunction with the Company's most recent Annual Report on Form 10-KSB, Quarterly Report on Form 10-QSB, and other filings with the Securities and Exchange Commission available online in the EDGAR database at www.sec.gov. Visit our website at www.sonexresearch.com

SONEX RESEARCH, INC.

http://www.sonexresearch.com

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