Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  10      ounces        beef broth
   3      tablespoons   lemon juice
   1      teaspoon      pepper
     1/4  teaspoon      garlic powder
   1      tablespoon    vinegar
   1 1/2  teaspoons     seasoned salt
   1      tablespoon    Worcestershire sauce
   1      tablespoon    soy sauce
   1      tablespoon    a-1 sauce
   1      tablespoon    corn oil

Preparation:

Marinate hamburgers for 4 hours. Turn every 1/2 hour. Seems to lock in juiciness and flavor enhanced.