Spice-Rubbed Salmon

2 teaspoons chili powder
1 teaspoon ground cumin
1 teaspoon packed brown sugar
1/4 teaspoon salt
1/8 teaspoon pepper
4 5-ounce skinless salmon filets
2 to 3 tablespoons cooking oil
Orange wedges

In a small bowl mix chili powder, cumin, brown sugar, salt and pepper. Rub spice mixture on salmon. On charcoal grill, place salmon on greased rack of uncovered grill, directly over medium coals. Grill salmon 4 to 6 minutes for each half inch of thickness turning once during cooking time. Serve with orange wedges.