The vehicle is my wife's 2010 kia sportage 4cyl 2wd auto 140k miles.great condition and only code that's pops up here and there is something to do with the oil flow indicator which I verified it always maintains oil pressure in spec. But I wonder.
I went and gave it a full check over and under the oilcap I found ALOT of milkshake so I cleaned it off and advised my wife she needs to let it warm up as she only works 7miles away and I don't think it EVER gets up to temp and it's only on the freeway once a week maybe . So I cleaned off the milkshake and checked again a week later and found low coolant and more milkshake , so now I'm kinda worried and add coolant and clean the cap and as much under the valve cover as I can. I also can see bubbles in the oil after short time of it running but see no coolant present in that. So after adding coolant and its been about a week I have not seen the level drop but theres another HUGE build up of milkshake.
the vehicle has seemed like a dog from the day we got it ( still under powertrain warranty as she got raped buying it from jd byrider) but now it's literally the slowest car I've ever driven and I'm worried the moisture in the oil over years ( I'm sure it's always done this ) might have worn down the cam or crank and it's just not making power like it should but still running good n smooth as everything still turns n opens correctly on the engine but just not enough.at cold start it has an ever so slight idle fluctuation for a min too but only fluctuates from 1000rpm to 700rpm then stops and idles perfect after 2min. any tips guys ? Should I look to install a catch can on this motor ??? It's just I think a 2.0 or 2.2 n/a kia motor

I had just cleaned it 2 days befor this and heres how much there is

 

Time to pull the head.

 

We took it in once and they insisted it was fine but this IS NOT acceptable. I'm going to take it there for my wife this time and handle it my self. I dont need a vehicle blowing up rite after warranty that my wife is ending up paying over double its value because she HAD to get it at the time with her bad credit n stuff when our s55 got totalled by an uninsured non-working/contributing individual and liability I found was a joke....
I kind of know what I'm going to tell the techs there but how do you guys feel I should go about this. It needs to be addressed asap befor it gets worse or the warranty is up which I think is what the dealer is trying to put it off until.
also I think I need to see if oil has maybe gotten into the coolant as it might be leaking that way, I never even thought about that . I will go outside and check it over when I have some more free time.
another odd maybe related symptom Is it takes for ever for her heater to get barely warm at best, I've hooked up a scan gauge and it runs at correct temps between 190-210