There was a post a few weeks ago about the different fork oil types which i can't find with the search. I think it might have been one of the Edinburgh folk, maybe Northwind?

Basically I want to know if there is something in Halfrauds or similar which will work for 15wt oil in a RS Revelation? I would like to swap the seals this weekend as they have started leaking but don't have any oil.

cheers
Mark

Any 15 wt fork oil should do for that if its not going in the damper.

great, thanks.

halfords only sold "light" "medium" and "heavy" last time I asked, which was a bit pants.

If you don't get any luck at Halfords, try your nearest motorbike dealer. I got a litre of a decent brand of 15wt fork oil for £7.50 – you can get 500ml bottles, just that my local was out of stock.
Good luck.