what oils should i get for CA18DET and skyline stumpy?

I tend to stick with Penrite as much as possible, anyone know off the top of their head which ones are recommended? otherwise i will search later tonight

i use valvoline synpower 10w-50 in my landcruiser

very good stuff i reckon!

Im going to use castrol magnatec 10w-40 in my CA, i think penrite make a 10w-50 which would be good if your going to do alot of hard driving as it has that extra 10 if the motor does get a bit hot and for summer months
Gearbox wise im gunna use nulon smooth shift 75w-90 in my stumpy , generally most nissan gearboxes will take this weight of gear oil

See if you can get a 5W-40. I use this in all my cars and are quite happy.
The gearboxes I use Castrol BOT130M. It is a full synthetic gearbox oil with specs of 75W-90 and GL4. It definitely improves shifting. Was recommended by most guys on our local VW forum who do allot of circuit racing and drag racing.