Preheat oven to 350°F. Grease loaf pan and line with parchment paper.
Combine flour, sugar, salt, and baking powder in the bowl of a stand mixer.
Place vegetable oil into a 1 cup measuring cup; add the egg and add enough milk to reach the 1-cup mark. Mix this with the flour mixture.
Fold in blueberries.
Pour batter into loaf pan.
Bake for 30 to 35 minutes in the preheated oven, or until a toothpick comes out clean.