I remember hearing that the OU and many other Hashgachos consider Olive Oil to be a category 1 item and therefore do not require any supervision or specail handling. So even when it bears a Hashgacha there was no actual supervision since there isnt any needed. Hoever there are those that feel that there is room and possibility of Kashrus problems with olive oil and therefore olive oil with Hashgacha is not necesarily reliable. Does this sound familiar or does anyone know anything more about this?