Preheat oven to 350 degrees. Grease a 7x11 inch baking dish.
To a bowl, whisk the vegetable oil and sugar together.
Add the eggs and whisk until blended nicely.
In a separate bowl, add flour, baking powder, baking soda, salt, and cinnamon,. Mix well.
Add 1/2 the flour mixture to the wet mixture and stir in the flour blend. Now add the shredded carrots, and crushed pineapple.
Now add the rest of the flour blend and mix everything until blended. No need to over mix.
Pour the batter into the greased baking dish. Bake for 30-35 minutes or until a toothpick comes out clean in the middle of the cake. Allow the cake to cool before icing.