Preheat oven to 350 degrees. Prepare a 9x9 baking dish with non stick spray. You can line the pan with foil and spray the foil for easy removal of the bars.
In a food processor, grind the graham crackers into crumbs. Add in the melted butter and sugar; pulse again until well combined. Press the crumbs into the bottom of the prepared pan. Bake for 15 minutes.
Once done baking, spread the shredded coconut all over the top and then pour the sweetened condensed milk all over the top. Bake for another 15 minutes.
In a microwave safe bowl, add the chocolate chips and vegetable oil; heat for 30 seconds at a time and stir between each time. Once the chips are all melted, spread the chocolate over the top of your bars. Cool completely. Process can be sped up by placing them into the fridge.
Cut the bars into squares making quick cuts; this will help prevent the chocolate topping from cracking.
Store covered in the fridge, best serve chilled.