BP5 recommended gearbox oil?

[Flyboy1218]

It is now due to change and would love to know which one is recommended?

[GorGasmSpecB]

Castrol Syntrax probably.

[Andy_Mac]

For my 6mt if i remember rightly i used the castrol universal 80w-90. Wanted syntrax but could only get it in 1L containers so was going to cost a crazy amount. Need a torx t70 for one of the drains if its a 6mt

[heylinb4nz]

Are me talking Manual or Auto ?

For manual the recommended fluid is 75W90 GL5, Subaru will most likely have their own spec fluid (Subaru Extra S), but you cant go wrong with Red Line Lubricants. (Pro Wholesale in Tauranga best place to get), 75W90NS will be what you are after

If auto\tiptronic, id reccomend letting Subaru dealer put in their stuff, thats what I did with my 5EAT, 30,000\3 years ago, no shifting issue. Apparently the 5EAT is quite specific with its spec (Subaru ATF-HP)

Don't forget your front and rear differentials, redline 75W90.....or just let Subaru do the lot and use OEM stuff.

[Andy_Mac]

Flyboys's got a 6mt

Will the 5 lower make much difference? Unless you're deep south is NZ really cold enough to make all that much difference?

http://www.datateck.com.au/lube/CastrolRetailNzl/

I used that. Use 07-08 2.5gt though as thats the only way to get the 6mt selection.

[heylinb4nz]

 Andy_Mac said:

Flyboys's got a 6mt

Will the 5 lower make much difference? Unless you're deep south is NZ really cold enough to make all that much difference?

http://www.datateck.com.au/lube/CastrolRetailNzl/

I used that. Use 07-08 2.5gt though as thats the only way to get the 6mt selection.

Doubt it, within the first few minutes of driving your fluid would be heading towards it operation temp viscosity anyway.

[GC8E2DD]

 heylinb4nz said:

Don't forget your front and rear differentials, redline 75W90.....or just let Subaru do the lot and use OEM stuff.

So 6MT front diffs don't share fluid with the rest of the gearbox like 5MTs?

[Andy_Mac]

Yea they do share the same fluid as the gearbox

[heylinb4nz]

 GC8E2DD said:

So 6MT front diffs don't share fluid with the rest of the gearbox like 5MTs?

Mine was 5EAT so had to get 2 lots of fluids.

Pretty sure the 5MT and 6MT share front so you can just by X number of litres of Redline to do the whole job.

Im not sure how the 75W90NS goes in diffs (I run 75W90 in mine) but apparently the NS is good for manual gearbox syncros, helps shifting).

Unless the legacy runs clutch type LSDs then the 75W90NS should be good to go all around.

[Flyboy1218]

Thank you all so much!! Id probably get a castrol syntax