Ray,
If I was just doing a "normal" cleaning, I would have continued with the GC. But I am doing the seal reconditioning procedure, which like Touring5 said, recommends dino.
I have already dumped it, and started the AutoRX with Castrol GTX 10w30 ($1.77/qt at Advance Auto). I guess it would have been possible to re-use GC with only 700 miles, but I would feel a whole lot better knowing virgin oil was in my engine after the full AutoRX treatment. With my luck, the oil would've gotten sand or crud in it from draining, and I wouldn't want that in my clean engine.
After my rinse cycle is done, I may go back to the GC unless I find another comparable, suitable oil (any ideas?). I'm still intrigued by the differences in Nissan's European recommended viscosities compared to the US (CAFE influenced??). A 10w40 may be more suitable for my engine, which is much quieter on the thicker 30 wt GC than other 30 wts (I haven't tried 40 wts, but they and even 50 wts are recommended in Europe for the same car).
I know some people are probably still gasping for breath after reading about 700 mile GC being drained (and it was the green). Sorry guys. I'm just following the AutoRX instructions for reconditioning a leaking seal. If it's any consolation, I really liked that oil. My engine was smoother, and definitely quieter. And if dumping the GC with so few miles wasn't bad enough, I also had a Mobil 1 filter on there.
Yeah, I've had a very rough day.... But I have no doubt it is for the best in the long run.
Dave