Preheat oven to 350°. Lightly oil1½ cups pan with a pastry brush. Line bottom with a parchment paper round and brush parchment with oil. Whisk eggs3, 1½ cups oil, and 1¼ cups sugar1¼ cups in a medium bowl until smooth. Add milk1¼ cups, vanilla, and zest and juice of 2 lemons and whisk to combine.