Safflower oil is a widely used cooking oil. So is grapeseed oil, although a little more controversial. I does have a high linoleic oil content, vitamin E, zero trans fats, and a high smoke point. I would taste these two and use them for cooking if there is no sign of rancidity. Don't taste the castor oil. It was used a bit before my day to motivate kids who just "didn't feel good enough to go to school". Kind of a trial by fire, if you were willing to swallow a slug of "therapeutic" castor oil, you were sick enough to stay home. Do not put any of them in a fuel tank. As far as bar oil, so many vegetable oils are being used nowadays, I doubt if it would do any harm, but would check the forums first. The castor oil might be used in a Tiki torch to ward off mosquitoes and possibly people.
