Preheat oven to 350°. Prepare an 8x4 loaf pan by greasing and flouring. You can also use parchment paper in addition to greasing and flouring to make removing the loaf easy when it is finished baking.
In a mixing bowl add flour, baking powder, and salt. Whisk together to combine.
In a separate bowl whisk together the vegetable oil and granulated sugar until fully combined, about a minute. Next, add in each egg individually, whisking until combined.
To the oil, sugar and egg mixture add the buttermilk, greek yogurt, lemon juice, lemon zest, and vanilla extract and whisk to combine.
Add the dry ingredients to the wet ingredients and using a spatula gently fold to combine, being careful not to over mix.
Once mixed, add in blueberries and gently fold into the batter, being careful not to smash the berries. Add batter to prepared plan and bake in the middle rack of preheated oven for 55-65 minutes until toothpick inserted in the center comes out clean.
Allow loaf to cool 10 minutes in loaf pan before transferring to wire rack for the remainder of cooling time.
When loaf is close to being completley cooled mix together your lemon juice and powdered sugar to form glaze.
Pour glaze over completely cooled loaf and enjoy!