Preheat your oven to 350°F (175°C) and grease a 9x5-inch loaf pan.
In a large bowl, mix together the pumpkin puree, vegetable oil, eggs, and sugar until well combined.
In a separate bowl, whisk together the flour, baking soda, baking powder, salt, cinnamon, and nutmeg.
Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
Pour the batter into the prepared loaf pan and smooth the top.
Bake for 50 to 60 minutes, or until a toothpick inserted into the center comes out clean.
Allow the bread to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.