Heat the oil in a large skillet over medium heat. Add the ground beef and cook undisturbed for 5 minutes. Break the beef up and continue cooking, stirring frequently, for 4 to 5 minutes or until no longer pink.
Use a slotted spoon to transfer the beef to a 4-quart or larger slow cooker. Add the remaining ingredients to the pot. Stir to combine the ingredients.
Cover and cook on low for 8 to 12 hours or on high for 4 to 5 hours.