REFINERY MARGIN TRACKER: US margins weaken as gasoline demand dips By admin Posted June 8, 2021 In In the News REFINERY MARGIN TRACKER: US margins weaken as gasoline demand dips2021-06-082021-06-08/wp-content/uploads/liberty-petroleum-icon-logo2.pngLiberty Petroleum Corp/wp-content/uploads/liberty-petroleum-icon-logo2.png200px200px US refining margins were mixed for the week ended June 4 as crude prices rose…