i pulled this image from a pdf i found online (linked to from the comments section of this Mark's Daily Apple post on cooking oils).
for better or worse, this datasheet was put together by Monsanto. funnily enough, it's meant to extol the virtues of Canola oil. if we look at this data as suggested by the original commenter, we should avoid the fats where the red and green percentages add up to anything > 12%. So the canola oil is OUT.
good ol' butter, lard, coconut oil and EVOO are IN.