Even if it's a synthetic blend or a full synthetic oil, it will still require the friction modifier unless the oil container states that it already has it.
OP, no, running the higher viscosity oil won't hurt a thing. In a couple of aspects it will even be benficial to have an oil with a broader viscosity index (less prone to heat breakdown for one). You'll never notice the slight increase in drag caused by the increase in viscosity on your mileage if you use a synthetic.