Marathon Petroleum (NYSE: MPC) booked higher-than-expected earnings for the second quarter amid higher processing volumes that partly offset weak refining margins. The U.S. refining giant reported on Tuesday an adjusted net income of $1.4 billion, or $4.12 per diluted share, for the second quarter. This beat by a wide margin the $3.09 EPS consensus analyst estimate compiled by The Wall Street Journal. Marathon Petroleum’s net income slumped to $1.5 billion for the second quarter, down from $2.2 billion for the second quarter of 2023. The…