ExxonMobil Subsidiary Participates in First Deepwater Discovery on Block 32, Offshore Angola.

Energy Editors/Business Editors

IRVING, Texas--(BUSINESS WIRE)--June 3, 2003

Exxon Mobil Corporation (NYSE:XOM) announced today that its subsidiary, Esso Exploration Angola (Block 32) Limited, has participated in a deepwater oil discovery on Block 32 offshore Angola.

The discovery well, named Gindungo-1, was drilled in 4,700 feet (1,445 meters) of water. The well flowed at 7,400 and 5,700 barrels per day from two separate zones. It is the first exploration well on Block 32, which is located approximately 102 miles (165 kilometers) offshore Angola.

Sonangol, the Angolan national oil company, is the concessionaire of the block and Esso has a 15 percent interest. The other Block 32 interest owners are Total (operator 30 percent), Marathon Oil Company (30 percent), Sonangol (20 percent) and Petrogal (5 percent).

ExxonMobil has a leading position in nearly all the major exploration and production areas in the world. The company is also a leading holder of deepwater acreage in the world's most attractive deepwater regions, including West Africa where it has interests in 15 blocks totaling almost 12 million gross acres. In Angola, Esso holds interests in six offshore deepwater blocks covering in excess of 7 million gross acres.

CAUTIONARY STATEMENT: Estimates and business plans in this release are forward-looking statements. Actual future results, including resource recoveries, production rates, and project plans and schedules, could differ materially due to changes in market conditions affecting the oil and gas industry, technical or operating factors, and other factors discussed under the heading "Factors Affecting Future Results" included in Item 1 of ExxonMobil's most recent Form 10-K and posted on our Web site (www.exxonmobil.com).