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Ok so here's the background. I bought this from original owner back in April 2019. Had a mechanic check it out so presumably there was no sludge under the oil filler cap, or smoking from the dipstick or oil filler cap or exhaust at that time (unfortunately I wasn't particularly sophisticated about cars at the time, i learned a hellauva lot more since then). Mechanic did say he felt it was slighly oil "wet" under Turbo - implying a possible very low flow oil leak. I bought the car from north NJ and drove it 2 1/2 hrs to south NJ with no issues.

Now for the next 6 MONTHS (no exaggeration) all I did was basically run the car twice a week for just enough time to move it to alternate sides of the street to avoid getting parking tickets (I didn't use it because of percieved electrical gremlins, but i resolved them, it was just my ignorance at the time). Also worth noting is that I live right on the NJ shore a block from the beach.

Now i finally got my crap together, know much more about the car than before, due some simple electrical maintenence work and fire up the car. No more electrical gremlins. HOWEVER, upon other inspections of my vehicle I notice that there's white creamy sludge under the oil filler cap (however i didn't notice any on the dipstick). In addition, there's light smoke (maybe Vapor?) coming out from both the oil filler hole and the dipstick sheath, as well as some amount of white smoke from the tailpipe (not a whole lot, but some).

So here's my question. Given that the car has literally been run so little for the past six months (and certainly not long enough to reach operating temperature) I'm torn between the worse diagnoses of a Head gasket issue to the less worse diagnoses of a crapload of water in the crankcase from condensation.

What do you fellow Volvo'ers think?

Also, could excessive condensation even cause all three -the filler hole, the dipstick, and the exhaust- to emitt white smoke?
 

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Kind of sounds like head gasket. Test compression in all cylinders and report back!
 

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Smoking dipstick and oil filler could be that the PCV is plugged and needs to be changed. Did you try the glove test?

I would try changing the oil first and see how it goes. It may have just been condensation from the car not being warmed up.
 
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