KSG,
Thanks for the reply. The info that temp flucuations can cause oil foaming is interesting, but in that case how does the oil get into the crankcase?
I have checked for antifreeze and oil leaks under the hood and on the ground, under the engine compartment and there is not a drop. Also, I noticed the slight antifreeze smell from the heater most predominant right at initial warm up, and checking under the hood, there is no antifreeze smell - so I'm fairly certain it's the heatercore.However, this is not enough to empty the coolant reservoir.
Since I had the thermostat changed and antifreeze flushed and filled, I know the reservoir was at the correct level 4-5 weeks ago.
I did a similar post on Volvospeed and a moderator/expert technition suggested this morning to change the oil, top off the antifreeze and have the system pressure tested to see (including heater core)_where the antifreeze is going.
Thank You
Bob Sc