A lot of American feeding habits leave me bemused (says he, from the land of warm beer) but the low point is when, somewhere in the midwest, I naively asked for some French dressing for a salad.
I was given a sachet of tomato sauce mixed with industrial acetic acid

Should have stuck to 1000 island....
French dressing is 5 parts virgin olive oil, I part white wine vinegar, salt and pepper, nothing else.
Sunflower oil is healthier than rape seed.