Yes, it is possible to put THC oil in a vaporizer. Vaporizers are commonly used for consuming various substances, including THC oil. However, it is important to ensure that the specific vaporizer you have is compatible with the type of oil you wish to use. Different vaporizers have different specifications and may require specific types or consistencies of oil. It is also worth noting that legality surrounding the use of THC oil varies greatly depending on your jurisdiction, so it is important to be aware of and comply with local laws.