I've been part time at Autobarn since high school, i've owned my skyline since highschool and im studying mechanical engineering, so they can't all be that bad
But seriously back to SuperS13's question, fully synthetic oils are 100% fine to use in a daily driven car. I've used it in mine for ages (owned it for 3 years and only ever ran 300V chrono or 4100 turbolight in it, depending how tight cash was. Now only ever run 300V) and its 100% fine and when i took the head off everything looked like new including all the bores. No need to treat the car any differently. Warm up times and shit have more to do with the viscosity then whether its a full synthetic or semi synthetic.
At the end of the day i always tell customers this. There is no one certain oil that can cover every single car, every climate and every use that the car is going to be treated too. For 90% of people an average off the shelf 10W40 or 20W50 oil (regardless of brand) will do the job. It's better to get the viscosity right for the climate and mileage on the car then it is for a specific brand of oil.
If you however can spend the extra money on a well branded oil such as 300V, redline, mobil 1, royal purple etc. Then honestly for a street driven car, you will never outperform above what the oil is capable off.
Hope that kind of made sense.