Oil type

Hello someone can tell me what type of engine oil and what kind of antifreeze should I use in my Cadillac STS 94 with 105,000 km

If it is with a 10W40 or 15W40 hydraulic tachies, if it is with 20W50 mechanical increases in my Liqui Moly opinion it is the best, in terms of the antifreeze if you do not go to snow or there are no temperatures below zero where you live in distilled water and nothing else, if on the contrary the climate is frozen a cooland 911 is perfect.

I really don't know, bring the Northstar 32v V8 engine

with reference to the antiforming; I prefer to put one that you have to dilute 50-50 since with water you run the risk that it is always to reach the Ebullicion point.