You’ll want to preheat the oven to 425 degrees. Then, in a small bowl, mix together 3 tb olive oil and 3tb chopped garlic, plus some salt and freshly ground pepper. Take a pastry brush and spread the mixture all over the pork. Place the meat on an oven proof wire rack inside a roasting pan and roast for 20 minutes, then drop the heat to 325, then cook about 4 hours, or until you get an internal temp of 185.

Remove the pork from the oven and let stand until cool enough to handle, about 30 minutes.

http://www.foodnetwork.com/recipes/aaron-mccargo-jr/simple-roasted-pork-shoulder-recipe/index.html