פירוש על עבודה זרה 71:2

The Talmud recalls that R. Judah [assumed below to be R. Judah Hanasi, but probably referring to his grandson], the rabbis took a vote and allowed Jews to use Gentile oil. If the reason for the prohibition was that the vessels of non-Jews imparted forbidden flavor to the oil, then we can understand why it was overturned. Some rabbis thought that since this flavor does not improve the taste of the oil, the oil is permitted.