The best is extra virgin olive oil. But any oil can be used. Vegetable, peanut, olive or even corn oil.
The oil, which is the heaviest would be okay to put first, but it's best to mix the oil and vinegar before pouring over the salad.
Oil and vinegar is a heterogeneous mixture.
oil and vinegar
No. Oil will float on vinegar as vinegar has the same density as water.
vinegar is more dense
olive oil + a dash of apple cider vinegar.
Vinegar is a heavier substance than Olive Oil so the Vinegar goes to the bottom and the Olive Oil stays up top
Vinegar oil bottles come two types. One comes with two bottles, one is oil and one is vinegar. The second type is the combined mixture of oil and vinegar which is used for gourmet cooking.
Oil has a lower density than vinegar. When oil and vinegar are mixed, the oil rises, or floats to the top.
vinegar!
When you purchase balsamic vinegar, you do not get the oil in the vinegar. However, it is possible to purchase a pine nut oil and balsamic vinegar salad dressing.
Vinegar oil bottles come two types. One comes with two bottles, one is oil and one is vinegar. The second type is the combined mixture of oil and vinegar which is used for gourmet cooking.