Preheat the oven to 325 F (160 C) degrees.
Grease and flour a non-stick large bundt pan or brush with pan release. Make sure to get into all the cavities of the bundt pan.
In a medium bowl whisk together the flour, baking powder, baking soda and salt. Set aside.
In a large bowl beat the butter, sugar and lemon zest until fluffy. Beat in the oil and vanilla extract.
With the mixer on a low speed, beat in the eggs one at a time.
With the mixer still on a low speed, beat ⅓ of the flour mixture into the butter mixture. Then mix in the sour cream sour cream. Mix in about ⅓ more of the flour mixture. Beat in the milk, followed by the rest of the milk. Stop mixing as soon as the ingredients are combined.
Stir in the lemon juice with a large rubber spatula.
In a small to medium bowl, toss the blueberries with the 1 tablespoon of flour.
Gently fold the berries into the batter using a rubber spatula.
Spoon the batter into the prepared bundt pan and gently smooth the top.
Bake in the preheated oven for 55-65 minutes, or until an inserted toothpick comes out clean or with a few crumbs clingy to it.
Cool the cake in the bundt pan on a wire rack for about 30 minutes, then invert the cake onto the wire rack and continue cooling.