Heat oven to 350°F and have a single pie crust, blind-baked and cooled completely.
Melt 2/3 cup of the chocolate chips and butter in a microwave-safe bowl and heat at 50% power, stirring often, about 90 seconds or until the chocolate is almost melted.
Add the oil and cocoa and whisk until smooth.
In a separate bowl, whisk together sugar, eggs, vanilla and salt until creamy and smooth.
Add the chocolate mixture and whisk until incorporated.
Add the flour and the remaining 1/3 cup of chocolate chips. Stir just until no dry flour remains.
Spread the pecans over the bottom of the pie crust and pour the batter evenly over the pecans. Use a rubber spatula to spread out the batter, if necessary.
Bake at 325°F, 30-35 minutes, or until a toothpick inserted in the center comes out with just a thin coating of batter attached.
Transfer pie to a cooling rack and cool 1-2 hours, until just warm.
Serve with a scoop of ice cream and a drizzle of chocolate syrup.