Thanks all for the feedback. I was specifically asking about ISO weight and the current weather climate I live in (SoCal). Not what fluid to use. I'll probably just go with ISO32 weight like recommend.
Picking up some non toxic fluid (in-case of leaks) for my QuickJacks and deciding what weight to choose. I live in SoCal and our temps range from 50f-90f. I was recommended ISO 32 but wondering if It would be better to step up to ISO 46 for the warmer months.