>>Tranny Fluid Info and Experimenting Thread<< (Amsoil, Redline, USC, etc.)

[DemonWRX]

06wrx4me.... thanks for the 24 page re-cap, uber helpful and time saving.

I have another question, when should the first change in tranny and diff be for the '11 WRX? That one Cobb article (which apparently they took down), as well as a poster in the 'Change to Syn now' thread, indicate that there is no need to wait to change over....then there are others that post you should run stock till the first 30K to break it all in.

FWIW, I am planning on going Subaru Extra S unless someone thinks there is better to be had....currently stage2, nothing special.

[Pavia]

You can change anytime after initial new car breakin period, so your good.

[WRXpa]

Now at page 24 we have come to some conclusions:

* We've decided Uncle Scotty's cocktail shifts nice for a while but breaks down really fast and needs really short change intervals.
--Also don't think syncromesh needs to be in the blend
--There is also concern it may cause extra wear

* Redline Lightweight Shockproof works well in the 5MT but not the STI trans (slinger lubrication versus pump)
--Seems to work just as well straight as mixed

* Straight Severe Gear 75w90 from Amsoil is not good in cold weather, but works well when mixed with shockproof

* SD_GR still loves his Valvoline conventional 75w90

* Subaru Extra S is the greatest gear oil to put in a stock Subaru
--It works well for a long time, shifts great, but is not sold in the quart. Its sold in the 5 gal drum, but many Subi tuners and dealer have it

FWIW Redline 75w90NS is what you'd run in the 5MT, but in non-mixed form it hasn't netted near the result of the Extra-S. Don't use MT90.

Thank you for this . Is there any point in changing the fluid at 1k miles? I'd like to get rid of the stubborn 1st and reverse gears. Otherwise, no issues with the tranny.

[Big Sky WRX]

I don't think you'll see much of a difference w/ 1st and R w/ a change of fluid- this being my 3rd WRX I've simply gotten used to it - now you could see a difference in 1st if your talking downshifting from 2nd w/ a fluid swap, not from a standstill however

[WRXpa]

I don't think you'll see much of a difference w/ 1st and R w/ a change of fluid- this being my 3rd WRX I've simply gotten used to it - now you could see a difference in 1st if your talking downshifting from 2nd w/ a fluid swap, not from a standstill however

I may end up swapping it for synthetic since I've read the WRX's come with regular fluid.

[SD_GR]

That time again... The parts store, bless them, didn't have enough of the white label Valvoline regular 75W-90 bottles so I got a bottle of grey Valvoline synth to top off the gearbox (it usually takes a touch over 3 bottles since gear oil is nearly impossible to drain, so I just used the synth for the touch and trust that products from the same firm are miscible -- not that anyone else worries at all about this stuff since people come up with cocktails and such anyway).

The rear doesn't matter anyway so it got M1 this time, since that's what they had and I'd rather use M1 in the rear diff than in my gearbox.

I dutifully used silicone on the rear diff drain plug because I'm a victim that believes everything in the manual, including that a viscous fluid will miraculously leak out of a drain plug tightened to 45 Nm without the magic silicone on the threads.

Car shifts fine.

[markthomas1969]

I know. No offense intended to TiC or any of their supporters, but you would have to be a complete idiot to spend $80+shipping for 4 qts of that gear oil. You can get it from SubaruGenuineParts.com for ~$150 for 20 qts.

SubaruGenuineParts.com = $7.50/qt
TiC = $20/qt

Can you post a link, I looked there and did not find the Extra S



I still do want to use the Extra S. The problem is I don't know of any local people who would want to buy the rest off me. All my Scoobie owning friends are 'take it to the mechanic for service' type of folks. I certainly don't want to have to deal with putting it in a different container and shipping it to recoup my costs.

We'll see, maybe if I'm unhappy w/ the Red Line mix (which I don't foresee) I will take the plunge for the Extra S.

[oaklandish_WRX]

Trying the Mobil Delvac GL-5 synthetic (but lacks friction modifiers) since the Torco GL-6 the tranny shop put in went to hell in a coupla thou miles. About 1500 on it so far and it gets better everyday. Very much like extra-s, but others say it does not do as well in cold temps as the SOA goop.