Preheat oven to 350°F. Grease or spray a loaf pan and set aside. In large bowl, mix oil, butter and sugar until well combined. Stir in eggs and vanilla until smooth. Gently stir in dry ingredients and buttermilk until mixed. Scrape sides to ensure no lumps are present. Remove 1/2 cup prepared batter from bowl and place into a separate smaller bowl. To that small amount of batter, stir in cinnamon and molasses.

Pour half of prepared batter into loaf pan. Spoon half of cinnamon batter in small dollops on batter. Pour remaining plain batter over top. Dot top with remaining cinnamon batter. Using a butter knife, swirl two batters together. Bake 45-50 minutes or until toothpick comes out with a few moist crumbs.

While loaf is baking, prepare Coating. Pour melted butter into a large shallow dish. Stir sugar, brown sugar and cinnamon together in a separate large shallow dish. After baking, cool 10 minutes before loosening edges and removing loaf from pan. The loaf should be very warm, but cool enough to handle.

Dip each side of loaf into melted butter until fully coated. Spoon remaining melted butter over the edges that tend to be more crispy. Transfer buttery loaf to the cinnamon-sugar mixture and press into the sides and top until fully coated. Slice into pieces and serve warm or at room temperature.