ZD30 Engine Oil

I know it's been done to death but I have a 2005 GUIV Big Z.

I havn't been it's best friend with picking the best oil for her.
I've seen the recommendations for Dello 400 and am happy to go
that way. But I have heard that it is better suited to warmer climates.
I live in good ól Tasmania so it's a bit cooler here. Is the Dello still ok
or is there something else I should consider.

I must admit I have chopped and changed brands too much and I need
to stick with one oil..

Opinions.

Hay mate I have found Penrite oils are one of the better ones . Tried Magnatec oils and found it burns more oil then Pennrite oils . so now just stick with this line . used it in the Nissan and the 91cruser I had before