The following video is part of our "Motley Fool Conversations" series, in which energy editor/analyst Joel South and senior technology analyst Eric Bleeker discuss topics from across the investing world.

In this edition, Joel continues to investigate the top-performing midstream companies in the energy sector. Next up on the list is Western Refining, which has appreciated its share price by 45% year to date. Western Refining has raised its gross margin by having immense exposure to discounted West Texas intermediate crude oil while having the luxury of selling its refined fuels at a premium to significant West Coast markets. However, where profits are made, competition ensues. Will the WTI versus Brent spread exist for the long term, allowing Western Refining to keep its unique niche intact? Check out the video below to find out.   

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Eric Bleeker has no positions in the stocks mentioned above. Joel South has no positions in the stocks mentioned above. The Motley Fool owns shares of Western Refining. Motley Fool newsletter services recommend Enterprise Products Partners and Magellan Midstream Partners. Try any of our Foolish newsletter services free for 30 days. We Fools may not 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.