Brush the turkey with olive oil.
Combine the seasonings and rub the mixture all over the turkey.
Place the turkey breast-side up in a 6-quart slow cooker.
Cover and cook on LOW for 5 to 6 hours, or until an instant-read thermometer inserted into the thickest portion of the breast registers 165ºF.
Remove the turkey from the slow cooker and let it rest for 10 to 15 minutes before slicing.