Cobram Estate and California Olive Ranch rank as two high-quality olive oil brands, according to Lifehacker. Low-grade brands include Filippo Berio and Newman's Own. Approximately 30 percent of extra-virgin olive oils sold in the United States are authentic, while 70 percent do not meet extra-virgin standards, as of 2013.
Consumers should consider many characteristics when choosing an olive oil brand, including the packaging and flavor. Quality manufacturers put their oil in dark glass bottles, since light causes the oil to degenerate faster than usual. Some also use nitrogen to keep the oil from oxidizing. Brands that taste fruity or bitter generally rank above those that taste mouldy or metallic.