ExxonMobil’s Imperial Oil shut down its oil-sands mine after a spill from a pipeline that supplies diluent to the operation. (Bloomberg) — Exxon Mobil Corp.’s Imperial Oil shut down its oil-sands mine after a spill from a pipeline that supplies diluent to the operation, adding to the woes of Canada’s beleaguered energy industry. Imperial announced the ramp-down of its Kearl mine in northern Alberta on Wednesday, following a leak Saturday that led Inter Pipeline Ltd. to shut the west segment of its 240,000-barrel-a-day Polaris system. The diluent Polaris supplies to sites operated by Imperial and Husky Energy Inc. is mixed with the sticky bitumen they produce, so that it can be shipped by pipeline. The disruption is just the latest blow to Canadian crude producers that had been struggling with a lack of pipeline infrastructure and competition from shale before the Covid-19 pandemic slashed demand from the U.S. refineries […]