You may think of aromatherapy oils as something to be enjoyed in the comfort of your home or during a spa treatment, however, with a little care and knowledge, this ancient art can also be used to improve your driving experience and make your trip happier, healthier and safer. And it should go without saying that you never use an oil burner in the car. . . use Soap Scent and Home Car Diffuser Kits or any available electronic diffusers designed for cars. The best aromatherapy selection of Essential Oil Blends for Car Diffusers.