Registered Forum User
Big Twin
Posts: 1,057
Join Date: Jan 2006
Location: Gloucestershire
Mood: Feeling peckish
No, you don't need expensive oil. I always used rock Oil Guardian semi synthetic in my 900ie, £16 for 4 litres, more than up to the task. castol / shell / silkolene equivelants are similar money, will be easily up to the task.