This article gives nice detailed explanations on when to use which oils. There are some that are better not to cook with and just use raw (ex. on salads). There are others that are known for higher heat points, and thus better for cooking. I suggest avoid Soybean, Canola, and ‘Vegetable Oil’ which is usually made from Soybean and/or Canola oil, which are often coming from genetically modified soy and corn.