NuStar Energy LP affiliate NuStar Logistics LP has extended an open season to Sept. 30 for its proposed South Texas Crude Oil Pipeline. NuStar is assessing shipper interest in capacity to transport Eagle Ford Shale crude oil from several terminal locations on its South Texas system in Frio, McMullen and La Salle counties to its Corpus Christi, TX, North Beach facility (see Shale Daily,July 24).