Quote Originally Posted by QUICKSILVER462 View Post
If your valve stem oil seals are bad, then a lot of oil could be lost and no signs will be evident.
I can see that. Would a compression test indicate bad valve stem oil seals? I suppose a failed result would indicate an issue but not necessarily that specific part. E.g. valve stem oil seals, piston rings...

I suppose that would not explain the coolant disappearance though.