What can go rancid the fastest corn oil olive or lard?

Corn oil is a vegetable oil extracted from the germ of corn. It is a common cooking oil and is also used in salad dressings, mayonnaise, and other food products. Corn oil is high in polyunsaturated fats, which are more susceptible to oxidation than saturated fats. This means that corn oil can go rancid more quickly than other oils, such as olive oil or lard.