The September issue of Consumer Reports ranks 23 varieties of extra-virgin olive oil from the US, Argentina, Chile, Greece and Italy. According to a taste test of 138 bottles, some of the better-known brands like Bertolli scored low, while others like Trader Joe’s California Estate took top honors. Consumer Reports noted that more than half the oils tasted fermented or stale, while only nine met the criteria to be considered “flawless.”