Milky white substance after first ARX treatment

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I'm an avid and rabid user of ARX for 6 years now and have used it on 4 different vehicles with positive results. My most recent car is a 1995 Volvo 850 with the 2.4 I5 non-turbo. It has an unknown number of miles, but believed to be around the 200k mark. It cycles through a quart of oil approximately ever 2500 miles. I performed my first ARX treatment after having owned the car for over a year. Within approximately 5 days and 1000mi of the treatment the car started feeling strange. I checked the dipstick and there was a thick milky white substance mixed with the oil, and more prominent than the oil on the stick. My first thought is that antifreeze is finding its way into the crankcase, yet the coolant level was unchanged.

The next day I had the oil changed by a Goodyear shop (not enough time to do it myself). I first asked them to look at the milky residue on the stick and they immediately concluded that it was coolant mixed with the oil. Though, again, the coolant level was completely unchanged.

It was a very slow day at their shop, apparently, and all four techs on staff and myself and my 1 yr old were watching as every last drop of oil drained from the oil pan. NOT ONE SINGLE DROP of white milky substance drained out, only brand spankin new oil. We were all befuddled. They threw in another 6qts of Mobil 20w50 conventional and Mann filter that I provided, charged me $17, and bid adieu.

It's been month since the post-treatment OCI, and the milky substance is just as prominent as ever on the dipstick. Having said this, the car runs really good after changing the oil. I put serious miles on it, probably around 700mi/wk, but the odo is broke and I'm only estimating.

I am really curious as to what this issue could be, and why the substance won't drain from the crankcase/oil pan, and most importantly what's its true form could be. Any ideas from the community would be very helpful and enlightening.

Thanks.
 
You just trowed away some money, changing the oil so early.
It is a good idea to take the car out for at least 1 hour drive, some times.
It will make sure the water evaporates, and you avoid to much water being present in the oil(can come from condense).

Check the PCV system, as well.
 
Simply condensation and the shop jumped to the conclusion it was a coolant leak. This white stuff accumulates under the oil cap as well as the dipstick in some vehicles. I seriously doubt you have a coolant problem so just keep an eye on it. As some noted heat that engine up with a good run every few days in extremely cold weather
 
Let's see...he's driving 700 miles per week. So recommending that he drive the car more doesn't seem like a cure to me. The PCV valve or hoses would be a likely place to look, and possibly a stuck thermostat?
 
Originally Posted By: REDDOG
What chevrofreak and INDYMAC said.


I agree. I would also consider pressure testing the cooling system just to be 100% certain there are no leaks. I have a feeling that the PCV system and or the T-stat is at fault. Nothing to do with the A-Rx.
 
These engines have a tendency to have the t-stats stick OPEN as the others have said. Do a cooling system maintenance cycle, replace the thermostat and see what happens.
 
I'm with INDYMAC:

He's a high mileage driver, I don't think it needs to be driven more.

On the other hand, the odo doesn't work and "that's OK", so other things could be broken too. T-stat, PCV system etc... I've seen a lot of euro cars route the PCV oil separator output into the dip stick tube. If something's going on with the PCV system it may be dumping directly on the dipstick and this is why it is so prevalent there.
 
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You could have a leaking head gasket. Has it ever been replaced?

Is the coolant in the reservoir cloudy? Or brown?

Not sure if non-turbos have an oil cooler, but if they do it's integral to the radiator and they have been known to crack, leaking oil into the coolant. Thus the brown cloudy coolant in the reservoir. Ask me how I know this. .
 
Originally Posted By: chevrofreak
Your engine isn't getting hot enough and/or your PCV system is not functioning.

Winner winner chicken dinner!

My 850's thermostat failed open. As did my brother's. My Dad's was rear-ended and totaled long before his could happen. Fix the thermostat and ditch the flame trap in the PCV system. Both are well-known problems with the 850s.

EDIT: again, why 20w50? I used 5w30 synthetic (whomever's was on sale at the time) through the blazing Atlanta heat & bitter Chicago cold without issues. If I knew then what I know now, I would probably use Shell Rotella T6 5w40 year 'round.
 
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With 200k+ miles on this vehicle, I'm not sure i'd be worrying about this at all.....the value has been 'gotten' out of this vehicle!
 
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