Most of the time i have been using Mobil 80w/90, 85W/90 not easy to find. This time i bought the Liqui moly 85W/90, its quality brand from Germany and had a great fillertube on top. Then again i only drive some thousand km before its time to change again, change it every 2 year. In my head as long as the spec are there you can fill what ever you want, more importan to change at the recomended intervall from car or oil manufactor.