check ur tires, sounds like a hightspot, probably be ure front tyres shagged since its a FWD, i hada customer last week with the same problem soon as you pull away the steering wheel shakes, could end up being a secerly buckled wheel , as rhyso says if that dont solve the prob worth getn ur wheel balanced check, wheel balance occurs between 60-70mph if u can out run it at those speeds and the steering wheel stops shaking then wheel balance is out ,would need more info on exactly whats happening for anyone to help u