[ITSv40]

I would change the oil completely, or as much as you can drain out. I changed the oil in my old p1 - Renault box at 150,000 and 300,000mls and was still good at 370,000mls. They are fussy as to the correct oil and I would get it from Volvo - comes in a 4lt can and costs about £40. At least you will know for sure the correct oil has been used.