NewMarket Corporation Schedules Conference Call and Webcast to Review First Quarter 2008 Financial Results 

Richmond, VA—April 7, 2008—NewMarket Corporation (NYSE: NEU) announced today it will release first quarter 2008 earnings at the close of business on Wednesday, April 23, 2008. The earnings announcement will also be available on the company’s website at beginning Thursday, April 24, 2008. A conference call and Internet webcast is scheduled for 10:00 a.m. EDT on Friday, April 25, to review first quarter 2008 financial results.

You can access the conference call live by dialing 877-407-8031 (domestic) or 201-689-8031 (international) and requesting the NewMarket conference call. To avoid delays, callers should dial in five minutes early. The call will also be broadcast via the Internet and can be accessed through the Company’s website at or A teleconference replay of the call will be available until May 2, 2008 at 11:59 p.m. EDT by dialing 877-660-6853 (domestic) and 201-612-7415 (international). The account number is 286. The conference ID number is 281601. A webcast replay will be available for 30 days.

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.

NewMarket Corporation Investor Relations
David A. Fiorenza, 804-788-5555
Fax: 804-788-5688