Steak Marinade

(From Veronica Jones)

1/2 cup oil
1/3 cup soy sauce
1/4 cup Worcestershire sauce
2 Tbsp. dry mustard
2 1/2 tsp garlic salt
1 Tbsp. pepper
1/2 cup vinegar
1 1/2 tsp. parsley flakes
1/3 cup lemon juice