Well we live in Brazil last 40 years. Can not believe I am Reading this, almost seems as a joke. In the US this problem?
Here they have "oil" that looks like in the bottle or can of olive oil and you must read the label. With its ever so increasing price here,. companies mix 40% olive oil with 60% soy oil. They have to state it on the container, as if caught, fines of 100s thousands of dollars and put out of business. Olive oil in Brazil is probably all imported. The government checks quality often, and most time is not at the proper weight/volume if any issues.
Here, we all know olive oil is so good for you, but of course, you can not drink it unless you really want to gain weight. Maybe this is why our daughters Always ask us to take up some when we go to the states.