Annoucement of Additional Holiday of the Company

1600 / 171 / 2003 September 25, 2003 The Stock Exchange of Thailand 62, Ratchadapisek Road, Klongtoey Bangkok 10110 Subject : Announcement of Additional Holiday of The Bangchak Petroleum Public Company Limited Attention : President of The Stock Exchange of Thailand The Company would like to inform that Friday 17th October 2003 will be an additional holiday for the Company's Head office, Refinery, and Phrapradaeng Lubricant Distribution Center at Samutprakarn. Please be informed accordingly. Yours sincerely, (Watcharapong Saisuk) Assistant Vice President, Corporate Planning Office Corporate Planning Office Tel: 0-2335-4583