Ok so this may sound dumb but it was a long day.
started diong my oil change on my 03 g35 coupe, climbed under the car for the first time, saw what I thought was a drain plug for the oil pan and removed it.
unfortunately it was the drain plug for my transmition reservoir.
After feeling like a complete idiot cuz it was sunday and my dealer was closed
I found amz oil synthetic atf fluid that is compatible with matic j fluid
re filled my tranny and did the oil change.
I will say though that with the amz oil in the tranny it shifts quicker and smoother

 

I am not familiar with the amzoil oil. But you should be ok. I have read however that these transmissions are very sensitive to transmission oils. So I would always err on the side of caution and just stick to the OEM fluid.(for the future)

 

thanks man
I have looked everywhere and found the same thing that you must use matic j,
however the amz does list it as bieng compatibable,
mabye I will check it out for deterioiration in a week to see
thanks