Combine oil and seasonings in a one gallon zippered bag. Add chicken and toss around until each piece is thoroughly coated
Add chicken to slow cooker and secure lid. Cook for 6 hours on Low.
Preheat oven to 400degF.
Remove each piece of chicken to a baking rack on a parchment paper covered baking sheet. Brush all sides of chicken with bbq sauce. Place in oven for 10 minutes.