This was Texas (and perhaps Oklahoma and Louisiana) oil. Texas alone produced a huge fraction of the oil used by all parties during WWII, with Russia being the

This was Texas (and perhaps Oklahoma and Louisiana) oil. Texas alone produced a huge fraction of the oil used by all parties during WWII, with Russia being the other major supplier. Texas oil shipped from Gulf of Mexico ports (probably Port Arthur, though there may have been others), around Florida, and up the East coast of the US, principally to New Jersey where the major East Coat refineries were. Probably Bayway Refinery, owned and operated by Phillips 66. There was no significant oil transport around South America so far as I'm aware. West-coast oil was supplied out of California, presumably the Pacific Theatre as well.