You would expect the start-up of Enbridge’s Line 3 Replacement project early this fall to have eased the constraints on crude oil pipelines from Western Canada to the U.S. — and it did. You’d also expect that L3R coming online would narrow the price spread between Western Canadian Select and West Texas intermediate — but it didn’t. The latest widening of the WCS-WTI spread, one of many in recent years, is another reminder that oil price differentials can be affected by many factors other than pipeline capacity availability. In today’s RBN blog, we discuss the host of issues that affect this all-important Canadian oil price metric.

