im not too sure on the 220ish comment in reguards to getting the temps up or condensation builds up. It is burnt off through the heat up of the oil, but could also lean towards running a cold oil and not gettin it to "burn off." kinda partial. i wouldn't know why anyone wouldn't put synthetic in the z, if your not its definitely a poor investment.
i also agree with the tight tolerance's causing a high temp for oil. I had my car 2months and nissan goodwilled me a cooler and installed it so there is no way for me to tell if it was just tolerance or my engine ran hot from the start. either way im glad i have the cooler because that means mods in the near future