Heat oven to 400°F. Line muffin pans with paper baking cups or lightly grease.
Combine water, oil, yogurt and egg. Add muffin mix and oats and stir until blended. Gently fold in drained blueberries. Scoop batter into muffin pan, filling cups 2/3 full.
Bake 20-23 minutes or until toothpick inserted into center comes out clean.