Need help. Oil in exhaust?

[907stroker]

Ok my truck has 59,000 miles on it
I bought it in November
Deleted it and have been running gear head tunes. Mainly tow tune
A month or two ago I started getting a little hanging throttle at times. I would push the peddle let off and the throttle would keep rising a little bit then drop.
I've taken it in to have checked and of course they can't get it to do the same thing even though when I drove off it did it.

Now a couple days ago I noticed a have a little bit of what seems to be sticky oil in my exhaust. I changed my tip is how I found out.
But today I went out and started the truck up and it started smelling pretty sour.
And I have seen just a tiny bit of oil condensation out the exhaust
I'm still under warranties but I would have to change my exhaust all back to stock
Put stock intake back on.
Which is a ton of work to being it in for them to probably find nothing wrong.

Any ideas on what could be going on. I hope not a turbo going out or anything but it might be happening

Oh also
I just started using rev x
Changed my oil and added it in with oil
And the fuel
Now I'm seeing problems like this
Thank you

 

[forcefed6.4ford]

If your worried about it go back to stock and take it in. Pretty sure an hours work is more cost effective then a set of turbos or worse. But hey, it's your truck.