In a medium bowl, whisk together eggs, granulated sugar and brown sugar until combined. Add oil and whisk until combined. Add pumpkin puree and sour cream and whisk until combined. Pour the pumpkin mixture into the flour mixture and mix gently just until combined.
Pour batter into prepared pan. Bake for 50-60 minutes until a toothpick inserted into the center of the bread comes out clean. To prevent the bread from browning too much while baking, cover it loosely with aluminum foil, about halfway through baking. Allow to cool in pan on a wire rack.