I am in agreement with the measurement and the fact that oil (especially canola or olive) are better for us than margarine. BUT…… certain recipes cannot use oil and margarine interchangeably, so if it is a baked good, like a cookie or pie, you may be altering the texture, or it may not come out right. If you are using it to saute something, or just add a little fat to, say, a rice dish, then the oil will do fine. For the amount of margarine in a given recipe, sometimes it is worth just eating the darn cookie, transfat and all. Occasional transfats, like occasional indulging in anything, probably will not hurt you. It’s the chronic abuse by eating transfats all the time, that clog our arteries.