Yes it is a base.
You can never go wrong with Olive oil or cooking oil, chopped garlic and onions
Yes, cooking oil is made out of oil.
it is a liquid since oil is pretty much like coal
cooking oil
Jews use oil in cooking for the same reasons that anyone uses oil in cooking.
The ancient Romans did not have petroleum. Their oil was olive oil, used for a variety of things such as cooking, lighting, bathing, a base for skin lotion and medicines, polishing wood, treating leather, and lubricating squeaky things.
If you are referring to oregano-infused oil, it is most common to use olive oil. But there is such a thing as pure oregano oil (pressed from oregano), but that is a nutritional supplement and not typically used for cooking.
The main advantage is to re-use (re-cycle) the cooking oil again, which saves having to buy new cooking oil. Though, eventually, new cooking oil will be needed to replace or top-up old cooking oil lost to evaporation, or cooking oil tainted with a strong smell, possibly from cooking a lot of smelly fish.
Mineral oil should NEVER be used for cooking. It is a petroleum byproduct, not a food-based cooking oil.
Because margarine is a fat as is the cooking oil.
They used butter and vegetable oil for cooking.
Wesson cooking oil was created in 1899.