 EL DORADO, Ark.--BUSINESS WIRE--Murphy USA Inc. NYSE: MUSA will release preliminary first quarter 2022 earnings results after the market close on Tuesday, May 3, 2022, followed by a conference call at 10:00 a.m. CT on Wednesday, May 4, 2022. Interested parties may participate by dialing 1-888-330-2384 and referencing conference ID number 6680883. The call can also be accessed via webcast through the Investor Relations section of Murphy USAs website at The 