I know oil is a topic thats been raised many a time and everypone has their own opibion on it.
My question though is different.
I have used SHELL HELIX HX5 15W40 in my Dr350 for the past 20 000km, with no issues.
In the 650 i have been using CASTROL ACTEVO MOTORCYCLE OIL - 10W40
I am now...