When I was a lad/before repatriating from Aus. to England, there was an advert where a chap said in a Godfather-type voice "oils ain't oils" - which was referring to the motoring kind but could also be applied to culinary matters, I guess. (Not sure where deep-frying oils can be reused as a biofuel..?)

As I say, the only one that really stands out from the others I've tried is olive oil.