GC8G WRX STI 2000 - Lubrication Recommendations

[OskarHey]

So been looking around the internet for a while and can't seem to find the FSM or fluid recommendations from anyone, not sure if i just haven't looked hard enough but whenever it comes to STI's its all 2004+ and its UDSM specs.

If i do find the 99-00 GC8 FSM its just for the WRX if i'm correct.. im not sure how much the fluids vary between that and the STI. Thought il'd reach out here for help see if anyone can shed some light.

I got a 2000 GC8 V6 WRX STI - 5 Speed, im planning to do a full service through all the fluids as it could use one i am assuming, so planning on doing rear diff, gearbox-center diff ( these share the same oil if I've read correctly? could be wrong ).

Just wondering my oils i should run? I live down south so it gets cold here in winter, but seeing if anyone here could please give me some valid information on what to run in it?

I've just read the 75W-90 for the gearbox and center diff? Assuming they share the same oil.. but yet again better safe than sorry.. as for rear diff, found nothing yet.

PLSSS

Thanks

[Guest]

Engine Semi synthetic 10w40 sm

Gearbox mineral 75w90 gl5

Stock r160 viscous diff mineral 80w90 gl5 if fitted with plate lsd get an lsd oil.

[Kiwi_Fozze]

5l oil fill to, that gives you a 0.5l overfill to help with lubrication under hard corners.

[boon]

 evowrx said:

Engine Semi synthetic 10w40 sm

Dealers here all use 5w30 fully synthetic?

[Guest]

 boon said:

Dealers here all use 5w30 fully synthetic?

Over specced but if you want to splurge go hard just wont see any outstanding benefit. V7- avcs run 5w30 full syn.

[Timmah]

 evowrx said:

Engine Semi synthetic 10w40 sm

Gearbox mineral 75w90 gl5

Stock r160 viscous diff mineral 80w90 gl5 if fitted with plate lsd get an lsd oil.

Sums it up nicely.

BNT sell FCUHS 75w90 gearbox and 80w90 diff oil at a good price and I find it to be pretty good.

In my old V3 Wagon I ran Penrite 10W50 with no issues, but 10w40 will be fine.

[OskarHey]

Sweet as cheers guys! My STI is fully stock so assuming it'll have the Viscous LSD? So run LSD diff oil 80W-90? Then 75W-90 Rated GL-5 gearoil for the trans and center diff? Is there any specifics as to mineral or synthetic with these oils? Which one the STi's prefer? First time ever dealing with oils and fluids at this part of the car, wasn't tempted to pay someone at all so might as well try it out myself and learn.

Also for plugs would NGK-SPO929111 Platinum be a good choice? Only got a Repco here in Queenstown but got a Trade account.

Just planning on doing full tune up today as i doubt anything been changed since 2011

[DacerX]

I use Motul Gear 300 because thats how i roll

[Timmah]

 OskarHey said:

Sweet as cheers guys! My STI is fully stock so assuming it'll have the Viscous LSD? So run LSD diff oil 80W-90? Then 75W-90 Rated GL-5 gearoil for the trans and center diff? Is there any specifics as to mineral or synthetic with these oils? Which one the STi's prefer? First time ever dealing with oils and fluids at this part of the car, wasn't tempted to pay someone at all so might as well try it out myself and learn.

Also for plugs would NGK-SPO929111 Platinum be a good choice? Only got a Repco here in Queenstown but got a Trade account.

Just planning on doing full tune up today as i doubt anything been changed since 2011

Talk to Reuben at Repco, he will look after you