Hi All, thought I'd post my applied fixes to this same problem.
Have a 2013 Edge with classic leaky PTU leaving splats of black oil on the garage floor with also the burning of the same oil splats on the exhaust crossing under the output shaft from the PTU.
I've read through many forums related to this issue in various forms and finally built up the courage to apply some of the methods to get past this issue. One important one being to add a drain for oil changes, but I also wanted to deal with the belching breather. In another forum I noticed on the focus, ford actually provides a kit to extend the breather into the engine bay by way of removing the old jiggly cap breather and putting this kit on that has a barbed insert, hose, and breather cap. Specifically the kit is AG1Z-7034-A. (forum I found this info: https://www.ecoboostperformanceforum.com/index.php?topic=6849.0)
I couldn't find any documented application of this kit to an Edge, but I did find someone with an Explorer put this on. Before purchasing, I thought I'd get under and feel it out to see if it were even possible. Glad I did because it isn't really possible to do that kit on the Edge without removal of the PTU. There just isn't enough room to remove the breather and tap in the barbed nipple for the extension hose. However, there's still a solution if you're motivated...
The jiggle cap breather is already installed, so I took a risk and knew that if I could remove the cap (blindly by reaching up through and over and just feeling it out), I could pull out the rubber check valve within and thus converting the vent into a nipple to put a hose on. I was ultimately successful by using a socket and shorty 3/8 ratchet. I slipped the socket over the jiggle cap and pulled to the side and rotating the ratchet. This essentially flared the jiggle cap open and after a bit of fighting I got the cap off. Next I fought the rubber check valve a bit, but in hindsight, just use a pick and it should just pull out easy.
At this point you'll have a "nipple" to put some 3/8 hose on. The breather body dia. is somewhere just under 1/2". I was able to slip the hose over with a clamp to secure it. At that point you can secure the top of the hose to the wiring next to the master cylinder up top. You'll need to find a breather online to put in the end of the hose. Something like a Toyota 90930-03136 or Dorman 924-284 Axle Vent. I just found this online, but as long as it is designed to breathe / vent outward, you should be ok. Even just a filtered vent would be fine. Just make sure it fits your hose. Of course you could buy the $75 kit for the focus mentioned above, but I cannot verify if that hose will fit the modified jiggle cap breather converted to nipple.
After this vent tube was installed, I drilled the drain and tapped a 1/8-27 NPT plug. I was able to drain the fluid and simply grab my royal purple bottle and just squirt it into the vent tube. Soooo easy.... Once it was dripping from the plug in the side (original fill location), I stopped adding fluid and buttoned everything up.
All in all I'm glad i have a full solution to this problem now. I'll update with results, but having ready all of the success in both of these mods, I am sure I'll be able to share the same results.
End comments: It may seem a little ghetto to mod the jiggle breather like that, but I assure you, unless you want to drop your PTU to do this, it's impossible to pull and replace that breather with something where it is located otherwise. And unfortunately, I didn't take pics, but there is enough documentation related, you can navigate your way through this without them.