Adapted from allrecipes.com
(18.25 ounce) package lemon cake mix
(3.4 ounce) package instant lemon pudding mix
cup vegetable oil
cup lemon-lime flavored carbonated beverage
Preheat oven to 325 degrees F (165 degrees C). Grease and flour a 10-inch Bundt pan. In a large bowl, combine cake mix and pudding mix, then stir in the oil. Beat in the eggs, one at a time, then stir in the lemon-lime soda. Pour batter into prepared pan. Bake in the preheated oven for 45 to 50 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool.