As an overall subsector, refining and marketing turned in a remarkable 2012, with Phillips 66 (NYSE:PSX), Tesoro (NYSE:ANDV), and HollyFrontier (NYSE:HFC) returning 60% to 80% for shareholders. One thing all these top-performing refiners have in common is their close location to cheap WTI crude feed stock. While the WTI-Brent price differentiation won't last indefinitely, the mid-continent refiners are sprucing up their operations now to return profits to shareholders going forward.  

See more in the following video.

Joel South, Taylor Muckerman, and The Motley Fool have no positions in the stocks mentioned above. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.