Combine all ingredients, except steaks, in a bowl and mix well. Reserve 1 cup of marinade and set aside.
Place steaks in a gallon resealable bag. Pour marinade over steaks and place in refrigerator to marinate for 24-48 hours.
Preheat grill. Place steaks on grill, discarding marinade. Grill steaks to desired doneness, while basting with reserved marinade.