MARINADE: in a bowl, combine the oil, soy sauce, vinegar, sugar, garlic, seasoning salt, oregano, and paprika.
PAT: the drumsticks dry using paper towels. Then add them to a gallon-sized zip-top bag.
COMBINE: Pour the prepared marinade over the drumsticks, remove the air from the bag and zip or lock. Squish the bag around to equally marinate the drumsticks. Place the bag on a plate and refrigerate for a minimum of 4 hours and up to 12 hours before grilling.
GRILL: Preheat the grill to 425ºF. Clean the grill grates thoroughly. Brush or spray the grates with cooking spray.
SEAR: Remove the chicken from the marinade and place pieces on the preheated grill. Cook for 18-22 minutes searing all sides on the hot side of the grill, and then moving it to the cooler side to cook it through without charring any further. Flip to brown evenly all over.
SERVE: You want the chicken to hit 170ºF internal temperature on a meat thermometer. Once it hits that number, remove to a plate and allow the chicken to cool for a couple minute before serving.