hi paul C and member here, im new in subaru impreza sti version 9, saw your dccd threat, it is interesting. may i know what gear oil spec suit our dccd (front transmission), i read some info from net our subaru sti v9 must use gear oil with out friction modifiers (eg. redline 75w90NS) to protect our gearbox brass gear but DCCD have clutch plate that means friction modifiers is needed for it right?(eg. redline 75w90) did subaru extra S is enough for it? pls help thx.