Preheat your oven to 350 degrees Fahrenheit (175 degrees Celsius).
Spray an 8x4 inch pan with nonstick spray, then line it with parchment paper.
In a mixing bowl, beat together vegetable oil, sugar, lemon juice, lemon zest and eggs.
In a small bowl, whisk together the flour, baking powder and salt.
Fold the wet ingredients into the dry ingredients alternately with milk until everything is combined.
Sprinkle 2 teaspoons of flour over the blueberries and stir them around so they're covered. This will help keep them from sinking to the bottom of the bread while it bakes.
Pour batter into prepared pan and bake for about 50-60 minutes. The top of the bread should be golden brown and toothpick inserted in the center should come out clean. Let cool in pan for 20 minutes and then remove from the pan to finish cooling on a wire rack.
For the glaze, whisk together powdered sugar with lemon juice and buttermilk until smooth. Drizzle over bread when it is completely cooled (and you can't resist eating it). If you'd like a thicker glaze, add more powdered sugar until you get the consistency you'd prefer.