3/4 c. oil
1 tbsp. onion juice or minced onion
1/2 tsp. dry mustard
1/2 can tomato soup
1/4 tsp. salt
1/4 c. vinegar
1 tbsp. Worcestershire sauce
1/4 c. sugar

Place all ingredients in blender. Add 1 1/3 cups mayonnaise. Blend well and chill several hours.