chopperman

I've just ordered Millers CRX LS 80w-90 NT.

I checked out your website AS Performance but you only seemed to sell 5L bottles. I only need 1 L, but thanks for all your advice.

Inviroman

iTrader: (2)

Will probably be going the same route, shame as only just changed the rear diff oil (2k ago) but worth it for £20 ish for the correct stuff
Threads like these are worth there weight in gold.

chopperman

53

iTrader: (41)

Motul 90PA here

chopperman

I was tempted to go for that as not only is Motul a great brand the 90PA was very cheap and came in 2L bottle. I went for the millers in the end because i only needed a litre and the motul is mineral rather than semi synthetic. whether that makes a real difference like is does with engine oil i wouldn't know.

53

iTrader: (41)

Not sure mate, tried Fuchs 90 but wasn't impressed.

chopperman

If you can believe write ups trying to sell you the product they say the semi-synth flows better when cold. better than what ?? well they didn't say

53

iTrader: (41)

Millers is good anyway mate As far as oils go Millers is on a par for me with the Motul

I'd like to try the Gulf Competition oils tbh as on paper they are comparable to the Motul only at half the price ! Their brake fluid is excellent

AS Performance

iTrader: (4)

probably because we tend to do most of our mail order the "old Skool" way over the phone, that way not only do we ensure you get the correct product for your vehicle and exact use but most likely at better pricing than most too.............
there's always email too

we will at some point manage to get some time to update but seeing as we get heavily involved in various engineering projects, builds, etc. then its a difficult balance time wise

rooferman

iTrader: (6)

Always phone alyn....simple.

He's a pleasure to speak to and you get accurate advise on the products and which is best for you.

You get a better deal than the online suppliers aswell

blackhawksti

Can someone clarify for me;
What's the best diff oil for Hawk Sti
How much do you need?
Is it as simple as drain plug out, re-fill and replace plugs?
Do you need new plugs/seals?
Can a fairly incompetent amateur do this?

chopperman

Post #21 in this thread answers your queston on which oil As for fitting, i believe it is as easy as you describe above. Not sure about seals but i read somewhere that normal plumbers PTFE tape around the threads to seal the plugs.
Rear diff takes about 0.8 L

blackhawksti

Thanks chopperman
Has anyone changed their diff oil recently? Did they use new plugs? With my nearest Subaru garage being a far distance from me, I'd be happy doing this myself after seeing a couple of youtube videos. Looks simple enough!
I just want to make absolutely certain on whether new plugs are required, or whether people just use the same (with or without PTFE tape, which sounds like a good idea!)

Inviroman

iTrader: (2)

I used the old plugs with liguid ptfe, there should be no need to replace the plugs.
Note: make sure you use the correct box key to fit the plugs and if they have not been out in a while can be tight, I first tried mine on the floor and could not get the leverage so used pals ramp and long breaker bar, job is simple.
Oil to be warm is best and let it fully drain with both plugs out.

53

iTrader: (41)

Just don't over tighten on refitting the plugs as you will split/crack the cover

AS Performance

iTrader: (4)

pretty straight forward as above, always suggest checking the "fill" plug isn't siezed before you drain using the lower plug.........

oil choice varies with exact use/power/etc. but for a road car then the likes of CRX80w90LS or the CRX75w90NT LS will work fine

0191-4103770

cster

I used a non LS oil in my 06 STI rear diff and it sounded like it was trying to rip itself to bits.
So I had a look in the manual and went down the 90LS route.
Happy days.

supshon

iTrader: (5)

Hi did your oil change fix your diff locking problem with tight turns when warm thanks

chopperman

On hearing comments like this i'm glad i asked the question making me wait a little longer for the LS grade oil.

Inviroman

iTrader: (2)

The plan is to do this tomorrow will post my findings.

chopperman

I am also interested to find out the result. I'm no expert but i think this would be a shimming issue rather than an oil issue. I hope i'm proved wrong as it would be a cheap easy fix for you.

supshon

iTrader: (5)

Thanks same problem with me only done it once when warm , haven't driven it since , oil in the post , p1 gearbox and rear diff

Inviroman

iTrader: (2)

Anyone running CRX LS 80w-90 NT in there none DCCD rear diff?
Did it make any difference?
Cheers

ditchmyster

iTrader: (7)

how often are you supposed to change the 5 speed gearbox and diff oil on non dccd and does it take the same stuff?

scoobyJim2

5 speed wrx's just use 75/90 semi synthetic in box and diff. comma make is fine. Im almost possitive that 6 speed & dccd etc. Use different. Sure its only something like every 20k you have to change it,but I usually do mine around every 12k. Rear diff is less than 1ltr so dont cost much for the oil anyway but the gearbox and transfer case is more like 4ltrs

AS Performance

iTrader: (4)

DCCD is part of the gearbox, wether you use "LS" or "non-LS" oil in the rear diff depends on the exact spec/model of car..............

various 5spd cars use LS rear diffs

Inviroman

iTrader: (2)

2002 Bug STi
Can I use this oil?
Cheers.

ditchmyster

iTrader: (7)

Just had a look on the opie oils web site and it quotes 1 litre of front diff oil, now not having done this before I'm now confused as to whether the front diff is separate from the gear box and as such requires it's own oil the same as the back and still not 100% as to what would be the best oil to put in diff/ diffs and gear box, I don't mind paying extra for the best stuff as it's not like i'm doing it once a month, but I do want the correct oil.

54 Blob wrx ppp.

Maz

iTrader: (34)

Millers CRX 75W 90NT will be fine for you Richard. The gearbox front diff (all in one) takes 3.5 litres or so. The rear diff takes approximately a litre. One five litre tub will suffice.

AS Performance

iTrader: (4)

yes for the rear diff the LS is perfect, do NOT use in a synchro gearbox though..........