Ranger, Codewize, Dkozloski, chime in here if I'm off base.......Your engine has the oil fill cap on the top of the timing chain case, correct? Next time you drive for a while, leave the engine running and pop the hood and carefully pull the oil fill cap. With a good flashlight, look down into the chain case. If there's visible oil frothing around in there, you have a drainback problem. Someone, AJxtc maybe, will see this and offer some insight into how oil drains to the pan from the chaincase.......I have no idea as to how much oil the cam valleys will hold, bur there has to be some drain system there, too.....Hopefully, as you drive the car and exercise the oiling system (more than it has been) the problem will gradually clear up. Curious that you don't get low oil/pressure alarms when this happens.....