Yes, mineral oil can be heated up. However, it is important to use caution when heating mineral oil, as it is a flammable liquid. It is generally safe to heat mineral oil to moderate temperatures, but it should not be heated to the point of boiling or ignition. It is also important to ensure that the container in which the mineral oil is being heated is appropriate for the task and is not prone to cracking or breaking. As with any chemical, it is important to use caution when handling and using mineral oil, and to follow all safety guidelines and instructions.