Pre-heat oven to 350°. Prepare an oblong baking pan with non-stick baking spray.
Mix Wesson oil, sugar, carrot, eggs, and can of pineapple (set aside 2 tbsp. pineapple for the frosting.
Sift together flour, baking powder, baking soda, salt, and cinnamon.
Add dry ingredients to the mixture.
Bake in a greased pan 25 - 30 minutes.