Hey guys,

Over the past few months Iv noticed a few times that there is that white stuff on the dipstick when I check the oil... The first time was after i washed the motor, I noticed the white stuff on the dipstick, replaced the oil and it was fine after.. I doubt any water got in from the washing but I thought it was possible..

Iv since had many oil changes and the other week I drove for a very short drive 3-4mins to a gas station, got gas and checked oil and i saw the white on the dipstick.. Maybe quarter of the oil on the dipstick is white stuff. Then I replaced the oil Saturday and now I noticed it again after the car sat for 30min after a long drive about 50mins on the highway. 95% of my driving is highway. THe car has never overheated since Iv had it (last 100,000km), It now has 255,000km.. There is no white stuff under the oil cap, or the coolant reservoir. The coolant reservoir just has dark goo stuff that I think is pretty normal. Iv replaced the coolant and cleaned out the reservoir the best I could but not all the stuff came out, and it hasent gotten any worse since I replaced the coolant months ago..

What do you guys thing I should do to diagnose this further. The engine runs perfect, very consistant fuel miledge, so I dont want to drive it till it dies, if it means pulling the head and replacing the gasket I will... Please help!!! The s90 is one of the best cars I ever driven I dont want to get rid of it!!!

Thanks
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1998 Volvo S90 SE (Black Cherry) 220,000+km