From the huge arrays of cooking oil in almost every supermarket, I must assume that many people use vast quantities, possibly in deep fryers, although nowadays it is much easier to cook chips in an air fryer.
But, I agree with you SueDonim, a couple of bottles a year, and very little more even when I had 2 children in the house.
NEW - "New Limerick Thread II 2016" (following New Limerick Thread
Aricle on what it's like to work as professional psychic witch


