REFINERY MARGIN TRACKER: US margins rise but new, impending lockdowns loom By admin Posted December 14, 2020 In In the News REFINERY MARGIN TRACKER: US margins rise but new, impending lockdowns loom2020-12-142020-12-14/wp-content/uploads/liberty-petroleum-icon-logo2.pngLiberty Petroleum Corp/wp-content/uploads/liberty-petroleum-icon-logo2.png200px200px US refinery margins trended higher in the week ending Dec. 11, but new lockdowns in…