1/3 c. cider or wine vinegar
1/4 c. ketchup
2 tbsp. salad oil
2 tbsp. soy sauce
1 tbsp. Worcestershire sauce
1 tsp. mustard
1 tsp. salt
1/4 tsp. pepper
1/4 tsp. garlic powder

Marinates up to 6 steaks. Marinate for 6 to 24 hours; turn occasionally.