For Rub: In small bowl mix together coffee, cumin, chile powder, pepper and brown sugar. Set aside.
For Pork Chops: Rub mixture evenly on both sides of chops. Place chops on a platter, cover with plastic wrap and refrigerate for 1 hour to overnight.
Remove chops, season with salt and pepper and rub each side lightly with oil.
Set clean, well-oiled grill to medium heat. When grill is hot, using tongs, place chops on grill. With grill lid open, cook until deep golden brown, about 4-6 minutes per side.
Reduce grill temperature to medium-low heat and cook until internal temperature reaches 160°F, about 2-4 minutes. NOTE: Pork chops may look charred because of coffee in rub.