Don't feel bad on the lack of replys...... as another new member here myself, I find very few responses to my questions too.
I learned a long time ago, there are no wrong questions,,, only wrong answers.!
Everyone on this board has been in the same situation as myself, new to working on these powerstrokes. I can tell you, people do not wake up one morning after buying their dream truck, and bingo !!! --- suddenly know everytihng there is to know. They too had to ask questions, possibly the same ones you and I ask. Some guys may be above the 'rookie' thing and don't want to get involved.
SO --- Back to your question. Try and perform a search on the topic you are asking questions about. I have found on this board and others, by doing the search feature, you can uncover a wealth of information, and maybe find your answer..
From what I have gatehred on here, a lot of the underhood oil mist you see is due to the crankcase evnting, hence the mod - CCV Mod. Check it out.
the silicone used on the stock motors from Ford seem to not hold up to oil residue as it will break down the silicone, causing leaks etc.. I have found on 'Dieselsite.com", they offer a replacement set of boots that are not silicone, purdy spendy, but once installed, you will never have that issue again. I too have some oil leaks that I am buying replacement parts for, and trying to find out some questions to answers I have posted on here, and largely to no avail.
ON the early model motors there is a difference in the boot ID's, and not so on the later models. On Dieselsite.com you will find the measurements listed on the replacement boot kits. One other thing to look into is the possibility of leaky o-rings on the turbo pedestel and on the rear of the oil pump, even the drivers side vent on the valve cover will leak some, I have both areas leaking on my 2001 motor as well as the crankcase vent oil mist issue.
Good luck, try the search feature,,, it's handy when folks are tight lipped......