Okay....I got a quick call from the service dept today from my Nissan Dealer. I didn't have much time to talk but it seems it was a minor issue regarding some part in the exhaust system that was stuck. It was an inexpensive fix. Sorry for being vaque...I'll know more when I pick it up tonight and I'll give an update tomorrow on exactly what it was. Anyway, it wasn't an oil issue. I'm sure if it happened to my Z, it could happened to someone elses so I know someone will appreciate the info. Hey....since it was an inexpensive fix that I wasn't assuming as I was preparing for the worst, now I have money to get that rear spoiler that I always wanted
