Oil change 20 miles ago and it is already black with white on top

Today I went out and checked oil in the truck and it had a oil change 20 miles ago and oil looked almost milky. So I went a got a glass to pull some oil out of the pan and for probably 45 minutes it had this white stuff on top of the oil before it disappeared. The oil is black as black.Can’t see it at the bottom of the glass. It’s usually around 10,000 miles before the oil starts to change colors so it’s definitely not right. Seems like the oil is thin already. Run 15-40 rotella. Lately I’ve been having an issue with the truck at idle (800rpm) the turbo starts to boost to 5-10. Knock idle back down to 700 it stops. Or bump it up to 1000 it stops. But between 800-1000 it has excessive exhaust back pressure. That’s getting looked at today. I was leaning towards that being the vgt actuator. Idk. COVID ruined my taste and smell so I can’t smell anything either.

 

Oil does have some fine shaving in it as well.
I’ve tried looking up symptoms and really not finding much but have seen a couple post where people asked if there trucks had fuel heaters and people never responded after that. The weird idle boosting didn’t start until I had the truck plugged in over night to the Engine Block Heater/ Fuel Heater (on the same plug) and it fried the electrical cord that was plugged in. Started truck and got a code for nox sensor and replaced that and code hasn’t come back up. Did notice month ago the breather from crank case started leaking oil not bad but enough to know it was there. Tighten up clamps and that helped but still have some coming from breather. Took that all off and cleaned it all up and noticed the parts of the hoses have a baked white burn to them. I think around the same time fuel mileage started going down a bit.

 

Oil was changed after that. Also I inspected the block heater plug and it looked clean

 

I did not. But I do know this shop very well as they are the only ones I’ve ever gone to. But you never know!

 

I was not. I go home when I drop the truck off there. I dropped the truck off around 3:30 and they didn’t get to it till the next day . I always check oil in the morning and it was nowhere that black. But on the way home between 700-1000rpm I’m have bad exhaust back pressure. Anything under or higher it is normal

 

It idles at 700 by itself. If I have to idle I bump it up around 950-1000. That’s just the way these cummins are