Yes, it will. Enamels and oils use compatible solvents, and oils are more susceptible to redesolving than enamels. You'd be better off using an acrylic wash over oils or enamels, or putting down a barrier coat of clear acrylic.
You can do oil over oil, enamel over enamel, and acrylic over acrylic washes—but the technique is different, as are the effects.