Dyno oil can and does clog up the EGR system and cylinder head oil galleries.
What will make the oil pour out are clogged EGR systems that cause increased crankcase pressure enough to pop out the engine seals.
Use full Synthetic oil in all Volvo engines for best results.
Bill
PS: Ivan,
Are you the same "Ivan" with a recent post about headlights ?
https://www.brickboard.com/AWD/volvo/1689455/V70-XC70/headlights_blinkers_elctrical_problem.html
Please go back and tell everyone what you did to solve your problem.
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