There’s a good book about how bad the Olive Oil situation is when it comes from overseas. Bottom line is that most of what’s coming in from overseas is mixed with ANYTHING else to make volume.
Lifehaker has some good notes:
The brands that failed to meet the extra virgin olive oil standards, according to this study: Bertolli, Carapelli, Colavita, Star, Pompeian. Eat Grown Local also reports: Filippo Berio, Mazzola, Mezzetta, Newman’s Own, Safeway, and Whole Foods in this list; the data may be from the earlier 2010 study when more brands were evaluated.
The real deal: California Olive Ranch, Cobram Estate, Lucini. Kirkland Organic, Lucero (Ascolano), McEvoy Ranch Organic are also noted by Eat Grown Local.