It hasn't happened to me. With my limited knowledge it most likely is oil burning off. It doesn't take a lot of oil and it just started happening you oil level could still show as full. I was burning oil in my old 300ZX but I only had to top-off the oil once a month so it can be very slow.
Have you done any changes to it? Any other leaks that you're aware of?
Let someone else take it for a drive where you can watch it and if there is smoke on accelleration and shifting then take it to the dealer.
Have you done any changes to it? Any other leaks that you're aware of?
Let someone else take it for a drive where you can watch it and if there is smoke on accelleration and shifting then take it to the dealer.