It most certainly does not keep the pot from boiling over. I’ve had it happen plenty. Same with the “place a wooden spoon across the top of the pot to prevent boilover” trick. That does not work either.
I agree that the wooden spoon thing is horse shit. Never once seen it work. The oil in the water does work for me. Now I know that many things may affect this. If you crank your stove up to eleven, maybe nothing will help. Maybe your altitude will affect it in some way. I live at about 350m above sea level. What I can say for sure is that in a large pot of water, at a rolling boil on my stove, about 3 tablespoons of oil in the water and a full pack of pasta, my pot will not boil over, but it absolutely will if I don’t add the oil.
It most certainly does not keep the pot from boiling over. I’ve had it happen plenty. Same with the “place a wooden spoon across the top of the pot to prevent boilover” trick. That does not work either.
I agree that the wooden spoon thing is horse shit. Never once seen it work. The oil in the water does work for me. Now I know that many things may affect this. If you crank your stove up to eleven, maybe nothing will help. Maybe your altitude will affect it in some way. I live at about 350m above sea level. What I can say for sure is that in a large pot of water, at a rolling boil on my stove, about 3 tablespoons of oil in the water and a full pack of pasta, my pot will not boil over, but it absolutely will if I don’t add the oil.