Heat oil in large Dutch oven over medium high heat. Add turkey wings, giblets and neck; sauté 15 minutes or until well browned. Cover and reduce heat to low; cook 5 minutes. Stir in onion and celery. Cover and cook 10 minutes, stirring occasionally. Add 8 cups water, bring to a boil. Cover and reduce heat. Simmer 30 minutes. Strain broth through a fine sieve into a large bowl; discard solids. Cool to room temperature. Cover and chill 8 hours or overnight. Skim solidified fat from surface of broth. Discard. Make about 7 servings, or 7 cups.