The most widely used vinaigrette ratio is 3:1, oil to vinegar. If you would like to increase the acid or sharpness of your vinaigrette, simply add more vinegar or citrus juice to your dressing.
Recommended Vinegars (Acidic to Sweet)
Apple Cider, Sherry, Red Wine, Champagne, Balsamic
Recommended Oils (Mild to Flavorful)
Olive Oil, Walnut, Flaxseed