Los Angeles wholesale gasoline differentials rose 13 cents a gallon on Monday after ConocoPhillips shut a unit at its139,000-barrels-per-day refinery in Wilmington,California,traders said.

Gasoline blended to meet California's strict environmental standards last sold at 46 cents a gallon over the November NYMEX RBOB gasoline contract. Los Angeles wholesale gasoline had finished at 33 cents a gallon over November NYMEX gasoline on Friday.

Conoco has said the unit closure was not expected to affect production at the refinery.