Heat oil in a skillet over medium heat. Add turkey, onion, and chile pepper; cook and stir until turkey is crumbly and no longer pink, 5 to 7 minutes. Transfer mixture (do not drain) to a slow cooker.
Add water, chili beans, black beans, corn, tomatoes, tomatoes and green chiles, tomato sauce, cumin, seasoned salt, seasoned pepper, oregano, and salt-free seasoning blend to the slow cooker. Stir well to blend. Cover and cook on Low for 8 hours.