In a large dutch oven, heat 1 Tbsp oil. Add turkey necks (or drumstick) and trimmings (if using) and brown over medium-high heat. Cook, turning meat occasionally, until browned on all sides, about 15 minutes. Remove meat and put on a plate.
Add 1 Tbsp oil to dutch oven. Add onion, carrots, celery, parsley and thyme sprigs, garlic, salt and pepper. Cook, stirring frequently, until onion is translucent, and vegetables are starting to brown well, about 8 minutes.
Stir in wine and bring to a simmer, scraping up all the browned bits on the bottom of the pot. Add 5 cups broth and bring up to a simmer over high heat. Reduce heat to medium-low, cover, and simmer for 1 hour, stirring occasionally.
Strain stock through a fine mesh strainer and discard solids. Set aside. You should have 4 cups of stock. At this point you can refrigerate the stock for up to 2 days.