Many thanks that's exactly the type of info I was looking for. I was worried I heard stories that if you switched to synthetic after miles had been done you ran the risk of damaging valve seals.

I have acquired my first Volvo and would appreciate some advice. It appears, touch wood, to be in very good condition it has a genuine 69,000 miles on it. I live in mid-Michigan, USA. My initial questions are 1. As it has been run on conventional oils would you stay on them at this stage or switch t...