Marinade for Deer

1 cup oil
1/4 cup vinegar
1/4 cup lemon juice
4 tbsp. Worcestershire sauce
4 tbsp. soy sauce
1 tbsp. parsley flakes
4 tsp. dry mustard
2 tsp. pepper
1 tsp. garlic salt

Pour over deer steaks; soak for 6 to 8 hours, turning steaks at least once. Grill steaks 10 minutes on each side.