[MrMigs]

Someone correct me if I'm wrong, but it sounds like what you want is an oil that's not too thick on cold starts and also doesn't thin out too much on hard running.

Supposedly, you can check this using an oil pressure gauge. The right oil for you will not have excessively high oil pressure at start and also will maintain a good oil pressure during hard running.

Makes sense to me, but I haven't actually tested this out on my own, so I'm hoping someone can confirm.