NewMarket Corporation Declares Quarterly Dividend

RICHMOND, Va.--(Business Wire)--
The Board of Directors of NewMarket Corporation (NYSE:NEU)
declared a quarterly dividend in the amount of 20 cents per share on
the common stock of the Corporation. The dividend is payable January
1, 2009 to NewMarket shareholders of record at the close of business
on December 15, 2008.

NewMarket Corporation through its subsidiaries, Afton Chemical
Corporation and Ethyl Corporation, develops, manufactures, blends, and
delivers chemical additives that enhance the performance of petroleum
products. From custom-formulated chemical blends to market-general
additive components, the NewMarket family of companies provides the
world with the technology to make fuels burn cleaner, engines run
smoother and machines last longer.

Some of the information contained in this press release
constitutes forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995. Although NewMarket's
management believes its expectations are based on reasonable
assumptions within the bounds of its knowledge of its business and
operations, there can be no assurance that actual results will not
differ materially from expectations.

Factors that could cause actual results to differ materially from
expectations include, but are not limited to: increases in product
cost and our ability to increase prices, timing of sales orders; gain
or loss of significant customers; competition from other manufacturers
and resellers; resolution of environmental liabilities; changes in the
demand for our products; significant changes in new product
introduction; the impact of fluctuations in foreign exchange rates on
reported results of operations; changes in various markets;
geopolitical risks in certain of the countries in which we conduct
business; our ability to complete construction of the office building
for MeadWestvaco Corporation within budget and in a timely manner; and
other factors detailed from time to time in the reports that NewMarket
files with the Securities and Exchange Commission, including the risk
factors in Item 1A, "Risk Factors" of our 2007 Annual Report on Form
10-K, which is available to shareholders upon request.

You should keep in mind that any forward-looking statement made by
NewMarket in the foregoing discussion speaks only as of the date on
which such forward-looking statement is made. New risks and
uncertainties come up from time to time, and it is impossible for us
to predict these events or how they may affect the company. We have no
duty to, and do not intend to, update or revise the forward-looking
statements in this discussion after the date hereof, except as may be
required by law. In light of these risks and uncertainties, you should
keep in mind that the events described in any forward-looking
statement made in this discussion, or elsewhere, might not occur.

NewMarket Corporation
David A. Fiorenza
Investor Relations
804-788-5555
Fax: 804-788-5688
investorrelations@newmarket.com

Copyright Business Wire 2008