Evening all,

Just came into possession of a 2012 WRX STi and looking to do a full fluid change.

Engine Oil - Fuchs Titan Race Pro S 10W-50
Front Diff/Gearbox - Millers MTF 75w 90 Fully Synthetic Gear Oil
Rear Diff - Millers MTF 75w 90 Fully Synthetic Gear Oil GL5 - I understand its an LSD in the rear and needs slightly different oil?
Spark Plugs - NGK LASER IRIDIUM SPARK PLUGS x 4 ILFR7H

Am I right with the above?

Currently has a semi forged engine, K&N filter & titanium exhaust, appears to have been mapped to suit the mods and running fine for the last 40k miles now on 85k or so. However noticed on occasion it when it hits around 5k revs on WOT it has a sort of soft cut to all power, almost as if youve hit the rev limit. Feels like poor mapping to me, unsure who mapped it but would be looking to get it redone, likely by Abbey Motorsport as they arnt far too far from me.

No DTCS stored as far as I can tell (checked via laptop with ECUTek) any other suggestions?

Cheers.

 

I was unaware it has a lsd, or at least a mechanical lsd. The handbook will confirm.

 

Ahh ok cheers. Why i thought id ask! Conflicting info online wrx dont have an lsd but some STis do.

 

Am assuming it's this one??
https://www.scoobynet.com/subaru-444...ve-340bhp.html

No LSD additive required.

Would have had the " 340R " map applied by Subaru UK (not Prodrive) on its arrival in the UK.

 

Lovely thanks!

So the engine was rebuilt and a new map applied which appears to be by Race Dynamics

Yes it is that car! Didnt know it was listed on here

 

Good news, my ECUTek EVi I had left over from my GT86 works with the WRX. Nice to be able to read/clear DTC and have some live gauges!