Preheat over to 350F
In a large pot, bring coca-cola, butter, cocoa and oil to a boil.
In a separate bowl, mix sugar, flour and salt, then pour the boiling mixture over the dry ingredients and mix until combined.
Beat eggs, buttermilk and vanilla together, and add to wet ingredients.
Pour batter into a 9×13 baking pan that has been greased
bake for 25-30 minutes.
Allow to cool for only 5 minutes before removing it from the baking pan, you want the cake still HOT.