More on Marathon Petroleum's (MPC) Q4 results: EPS of $2.24 was a reversal of prior year's $0.21 loss. Refining and marketing swung to an operating profit of $1.14B from a year-ago loss of $182M. Capital investment plan for 2013 totals $1.6B. Approves an additional $2B stock repurchase authorization, bringing total authorization to $2.65B. Shares +2.1% premarket.