Canola was an originally grown as a substitute for mineral oil for lubrication. The chaff was used to feed livestock, including dairy for cream and butter.

Then “The Companies” realised that cutting out the middle man (cow) was profitable and margarine was created.

My brother went from being an Automotive Parts rep to a Food Processing Industry Parts rep. If you think your local Mechanics used motor oil drum is disgusting, you need to avoid visiting a Margarine plant.