hifi engine

Pioneer PL12D Tonearm oil

Can anybody give me any advice on what grade damper oil Pioneer used on the PL12D tonearm? Contacting Pioneer they point out they can no longer support this turntable. I have been able to find silicon damper oil on the internet but there are many grades. If anyone has any imformation or can point me to somewhere that has the correct grade oil, I would be very grateful. Many thanks.