Slow Cooked Spiced Pork

There's nothing better than arriving home after a long day and being greeted by the smell of a slow-cooked dinner. This one is especially satisfying, with lots of spice and plenty of savory enhancements.

1 Pork butt roast, from 3 to 4 pounds
1 tablespoon Vegetable oil
1 tablespoon Chili powder
2 teaspoons Pepper
2 teaspoons Cumin
2 teaspoons Coriander
2 teaspoons Paprika
1 teaspoon Allspice
1/2 teaspoon Salt
2 cloves Garlic, minced
1-1/2 cups