May 29, 2008 Subject: Interim Dividend Payment To: President of The Stock Exchange of Thailand CC: Secretary-General of The Securities and Exchange Commission Dear Sir, Esso (Thailand) Public Company Limited ("Esso") would like to notify the Stock Exchange of Thailand that as the Company has unappropriated retained earnings as of year end 2007 of Baht 10,739 million, the Board of Directors of Esso has resolved at a Board of Directors' Meeting No. 4/2008 held on May 29, 2008 to declare an interim dividend of Baht 1.00 (One Baht only) per share to the shareholders whose names appear on the share register book on the book closing date (June 20, 2008 at 12.00 hrs.) which dividend shall be paid on June 27, 2008. Please be informed accordingly. Yours truly, ESSO (THAILAND) PUBLIC COMPANY LIMITED ....................................................................... (Mr. Daniel E. Lyons) Managing Director