The flavor of olive oil is influenced by: 1. climate, 2. the area that the olive tree is grown, and 3. when the olives are harvested. An early harvest of green olives produces stronger flavored olive oil. How olive oil is produced is also important. Cold-pressed Extra-Virgin Olive Oil often has a stronger flavor.  For less flavorful olive oils consider adding spices, lemons, or peppers to the oils to add more flavor. Simply add your flavoring agents to an olive oil bottle or container and top off with olive oil. Store in the refrigerator for a week to allow time for the flavor to infuse into the olive oil.