Oil and vinegar are common ingredients used in cooking and salad dressings. Oil is typically derived from plants, such as olives or sunflowers, and is known for its rich flavor and smooth texture. Vinegar, on the other hand, is made through the fermentation of ethanol and has a sharp, tangy taste. When combined, oil and vinegar create a flavorful dressing that enhances the taste of salads and other dishes. They do not mix well naturally, so they often require shaking or whisking to combine. This mixture can be seasoned with herbs and spices for added flavor.