sweet & sour four-bean salad

Ingredients

• 1/2 cup vegetable oil
• 1 1/2 cups apple cider vinegar
• 1 can campbell's tomato soup, undiluted
• 1 can italian green beans, drained
• 1 can yellow wax beans, drained
• 1 can red kidney beans, drained
• 1 can butterbeans, drained
• 1 small jar diced pimentos
• 4 sticks celery, chopped
• 1/2 - 1 medium purple onion, chopped
• - salt & pepper to taste
• 1 cup sugar