Oil Used For Turbo Rev 2

[swales_p]

Im sure this has been posted 100's of times before but i carnt find it using the search section at the bottom of the page so im going to have to ask the question again!! sorry :)

Anyway, what oil should i use in my Turbo Rev 2? it needs a top up, and seeing as i carnt afford a service yet, im going to have to do it the cheap way and put a wee bit of oil in just to keep it at the max level for now.

Cheers