Preheat the oven to 350°F (175°C). Grease and flour an 8-inch round cake pan.
In a large bowl, whisk together the all-purpose flour, granulated sugar, baking soda, baking powder, and salt.
In a separate medium bowl, combine the vegetable oil, water, lemon juice, lemon zest, eggs, and vanilla extract. Whisk until well blended.
Pour the wet ingredients into the dry ingredients and stir gently until just combined. Do not overmix.
Pour the batter into the prepared cake pan and smooth the top with a spatula.
Bake in the preheated oven for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean.
Remove the cake from the oven and let it cool in the pan for 10 minutes.
Turn the cake out onto a wire rack and cool completely before serving.