1/2 c. soy sauce
1 c. ketchup
1 c. red wine vinegar
1/2 c. garlic oil

Mix together, place steaks in mixture (does better on filet mignons or rib-eyes) in re-sealable Tupperware container. Leave in refrigerator 24-48 hours before grilling steaks. Turn container over every 10-12 hours. Makes great tasting steaks.