In small bowl, combine sour cream, cilantro and taco seasoning mix; mix well. Set aside.
On 2 tortillas, layer turkey, cheese and chiles. Top with remaining tortillas. Brush top of each quesadilla with about 1/2 teaspoon oil.
Spray large nonstick skillet with nonstick cooking spray. Heat over medium heat until hot. Place 1 quesadilla, oil side down, in skillet; brush top side with about 1/2 teaspoon remaining oil. Cook about 2 minutes or until light golden brown.
Turn quesadilla; cook an additional 2 minutes or until light golden brown. Repeat with remaining quesadilla. Serve with sour cream mixture.