it is normal to have oil residu dripping at the exit of the pipe. After you run for few minutes, do 2 or 3 WOT. Touch the fluid coming out of the pipe. If it is cold at the touch, you have methanol and nitro coming out of it (unburned fuel), you are too rich. if it is just a sticky fluid this is just oil and you are not too rich.
You cannot tell if you are to lean that way. Like Hyper701 said, you can get a temp gun to help. But, temp doesn't say it all, but it helps at least to not be to lean.