Yeap Nismo.... I use 5w-50 or 10w-60 in Summer
0-40 or 5-30 in winter
I've tried many different oils over the years... full syn ones..... Mobil 1, Pennzoil.... Castrol.... Penrite....Shell....
Can't see a noticable difference between them though..... the only thing in common is that they get very dark after about 4000km....
I am starting to wonder these much more expensive full syn oils are worth it...
Haven't had my car on track where ppl said there is a difference...
though my fastest 0-100 time is done on a 5w-30 oil..