I have Volvos 5.0 on my 320, and am about to make an oil change. Apparently, the previous owner has been using Quicksilver 25-40. I would like to make a change and Mobil 1 Synthetic 15-50. The guys at the shop where I got the oil told me that often synthetic oils will cause a motor that has been using conventional oil to leak. Has anyone experienced that? Should I continue with the Quicksilver brand?
Thanks in advance.