Afton Chemical First Additive Company to Receive TOP TIER Diesel Approval

RICHMOND, Va.–(BUSINESS WIRE)–Afton Chemical announced today that its North American Diesel
Performance Additive (DPA) product line is the first in the industry to
receive TOP TIER™ Diesel approval. The recently launched TOP TIER^TM
Diesel standard seeks to increase diesel fuel quality by establishing
performance requirements for diesel fuel in five key parameters:
detergency / injector cleanliness, oxidative stability, lubricity, water
content, and particulate count. Afton’s DPA product line, containing
Greenclean Detergent Technology^TM, has been proven
to successfully deliver the required level of performance specified in
the standard.

Fuel quality plays a vital role ensuring equipment is able to run
properly, preventing unscheduled downtime for maintenance, and
maximizing operational profitability for drivers and operators. Today’s
basic fuel standards may not protect against some potential field
issues. In 2004, TOP TIER™ Gasoline was launched by a consortium of
global automakers as a voluntary program for fuel retailers to address
engines’ need for higher levels of detergency to protect the vehicles’
increasingly complex fuel systems. Earlier this year, TOP TIER™ released
their standard for TOP TIER™ Diesel in an effort to increase diesel fuel
quality, address consumer field issues, and enable optimal vehicle
performance for today’s equally complex diesel engines.

“In order to continue to provide best-in-class diesel additive solutions
to our customers, we are committed to designing chemistries that help
prevent performance issues occurring under real world operational
conditions,” said Alexandra Fersner, Afton’s North American Marketing
Manager for DPA. “We support all fuel quality efforts that seek to
improve the operability and longevity of diesel engines in all types of
equipment,” said Fersner.

Afton is looking forward to working alongside fuel retailers and
distributors to implement DPA products into their TOP TIER^TM
Diesel programs in an effort to raise diesel fuel quality across North
America.

TOP TIER™ is a trademark of General Motors, LLC
Greenclean
Detergent Technology^TM is a trademark of Afton Chemical
Corporation

About Afton Chemical Corporation

Afton Chemical Corporation is part of the NewMarket Corporation (NYSE:
NEU) family of companies. Afton Chemical Corporation uses its
formulation, engineering and marketing expertise to help their customers
develop and market fuels and lubricants that reduce emissions, improve
fuel economy, extend equipment life, improve operator satisfaction and
lower the total cost of vehicle and equipment operation. Afton Chemical
Corporation develops and sells an extensive line of unique additives for
gasoline and distillate fuels, driveline fluids, engine oils and
industrial lubricants. Afton Chemical Corporation supports global
operations through regional headquarters located in Asia Pacific, EMEAI,
Latin America and North America. Afton Chemical Corporation is
headquartered in Richmond, Virginia. For more information, visit www.aftonchemical.com.

Cautionary Note Regarding Forward-Looking Statements:

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, the availability of raw
materials and distribution systems; disruptions at manufacturing
facilities, including single-sourced facilities; the ability to respond
effectively to technological changes in our industry; failure to protect
our intellectual property rights; failure to attract and retain a
highly-qualified workforce; hazards common to chemical businesses;
competition from other manufacturers; sudden or sharp raw material price
increases; the gain or loss of significant customers; the occurrence or
threat of extraordinary events, including natural disasters and
terrorist attacks; risks related to operating outside of the United
States; the impact of fluctuations in foreign exchange rates; an
information technology system failure; political, economic, and
regulatory factors concerning our products; future governmental
regulation; resolution of environmental liabilities or legal
proceedings; our inability to realize expected benefits from investment
in our infrastructure or future acquisitions or our inability to
successfully integrate future acquisitions into our business; 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 2016 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
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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.

Contacts

Afton Chemical Corporation
Lauren Packard, Marketing Communications
804-788-5800