In a large bowl, whisk together the wet ingredients: oil, sugar, milk, vanilla, lemon juice, and lemon zest.
Sift in baking powder, baking soda, salt, and flour. Toss in blueberries, and fold the mixture with a spatula until combined. Do not overmix.
Transfer the batter to the loaf pan, then bake for 50-60 minutes or until an inserted toothpick comes out clean. Let the loaf cool in the pan for 5 minutes before transferring to a wire rack, then let cool completely.