July 8 (Reuters) - Exxon Mobil said on Monday changes in oil prices would increase the oil major's second-quarter upstream earnings by $300 million to $700 million compared with the first quarter.

The largest U.S. oil producer had posted $5.7 billion in upstream earnings for the first quarter ended March 31.

(Reporting by Tanay Dhumal in Bengaluru; Editing by Krishna Chandra Eluri)