Pure vegetable or olive oil does not contain gluten.
Not usually. Even if cooking oil is a mixture of different oils, all oils will dissolve in other oils. You only use emulsifiers in water/oil mixtures.
Cooking oil is not a mixture. It is more like a substance.
More than hundred cooking oils are known and used today; each has a different composition. Also cooking oils are mixtures and doesn't have a chemical formula as a compound.
Cooking oils are mixtures of fatty acids; a general scientific name or a single formula doesn't exist. Now are used more than 100 cooking oils, each with his specific composition.
Yes, cooking oil is made out of oil.
Nope.
oil and water
cooking oil
Jews use oil in cooking for the same reasons that anyone uses oil in 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.
Bleach, Oil, Blood
They used butter and vegetable oil for cooking.
Wesson cooking oil was created in 1899.