Exxon Mobil Corp. is forecasting banner second-quarter earnings that could come in as high as about $18 billion, largely on higher oil-refining margins and rising prices for oil, natural gas and fuel. These projections aren’t precise and exclude certain factors, including specific costs incurred by Exxon , XOM 2.23%▲ but its second-quarter profit could be its most lucrative in at least 25 years, according to FactSet. The Wall Street Journal Continue reading your article with a WSJ membership