Dot 4 will do the trick.
get hold of some Castrol response or similar synthetic fluid. Might cost a bit more but you know the beast is worth it.
PM me your reg buddy and I will see what I can do for you.
RRP on 1l is around £8 but for a top up you will only need a .5l
Add £3.00 to the Forge recirculator price and I will add it to the delivery buddy.
Unless you need it right away???
El