Ok so I have a build on here and its like 99.9% done and I'm about to put oil in it and start it, and I've been reading and searching about what oil to use but I've found about 80 different answers!!! I Know to each there own, but I know I don't want to use synthetic oil so that narrows it a little.. I know that in my stock z6 I ran 5w30 but I think that the general consensus is that I need to run a thicker oil with my turbo setup.. so 10w30 or 10w40 ....... and what's with people running delo ? is it because of it has zinc in it? As far as I know zinc helps with lubrication and anti wear right? any help with any of this would be great as well as any help with what would be good oil for my 300-400hp turbo'd z6 would be great.. I'll continue to read and figure some of this out!