Let the oil and vinegar sit for a while. They will separate and then you can pour off the oil.
Work Step by Step
This question asks us how to separate a mixture of oil and vinegar. This means we have to use their physical and chemical properties to separate them. Oil is less dense than vinegar, so eventually all the oil in the mixture will rise to the top, and the mixture will have two distinct layers, one with the oil, and another with the vinegar. Then you can just pour out the oil, separating the two.