Key TakeawaysExxonMobil said lower oil prices and refining margins will lower third quarter profit as compared to the second quarter.The company predicted that the change in prices would lower upstream earnings by $600 million to$1 billion, and the change in industry margins would do the same for energy products.ExxonMobil's stock price has basically mirrored the price of oil this year. ExxonMobil (XOM) warned that lower oil prices and refining margins will have a negative impact on third quarter results a ...