Jump to content
SAU Community

Recommended Posts

Hey everyone

I have got a 2way Cusco diff and would like to buy some oil. On their website they say use an oil with a viscosity of 80w-140.

I rung up the local workshops(Xspeed, Intune, cypher industries, Nissan).

Xspeed said they will ring me back, cypher industries said they have redline oil however they recommend to use a 75w-90 because 80w-140 is to thick.

Intune and Nissan both just dont stock any of those oils, Nissan dosnt stock Nismo oil either.

So i just wanted to know what viscosity should i stick to? 80w-140 or as recommended by the workshops 75w-90? The car is going to be used on the track and also as a daily.

Finally does anyone know who in Perth holds redline, motul or nismo oil to buy?

Cheers guys, ni

Link to comment
https://www.sau.com.au/forums/topic/324793-where-to-get-oil-for-diff/
Share on other sites

Hey everyone

I have got a 2way Cusco diff and would like to buy some oil. On their website they say use an oil with a viscosity of 80w-140.

I rung up the local workshops(Xspeed, Intune, cypher industries, Nissan).

Xspeed said they will ring me back, cypher industries said they have redline oil however they recommend to use a 75w-90 because 80w-140 is to thick.

Intune and Nissan both just dont stock any of those oils, Nissan dosnt stock Nismo oil either.

So i just wanted to know what viscosity should i stick to? 80w-140 or as recommended by the workshops 75w-90? The car is going to be used on the track and also as a daily.

Finally does anyone know who in Perth holds redline, motul or nismo oil to buy?

Cheers guys, ni

Either 75/90 or 85/140 will be OK. Make sure it is a LSD oil. I believe most aftermarket diffs require a mineral oil, I know Kazz recomend mineral and say to avoid synthetics.

What does the Cusco instructions say?

Hey guys

I think ive found the oil i am after which is the Motul 90PA Differential Oil..

Was reading a few threads on forums that had people talking about the Cusco 2ways and they found the Motul 90PA Differential Oil to be the best solution. It's a mineral based oil also..

Has any one else used this on there diff, if so how would you rate it?

thanks for all the help :D

Ni

No problem if you don't mind the extra wear and noise
I use Castrol saf xa 75w90 in my cusco 2 way.

Drives mint.

Can get it from most auto shops

Hey guys

Hmm i have no idea now which oil to choose. i say this because im getting a 50/50 opinion where some people state that the75w-90 is the best option, then other people say use a thicker oil such as a 80w-140.

cypher industries said that the 80w-140 will be to thick for a car that is also used on the road and that when i come into tight turns it may be to tight, hence why Zac said to go a thinner oil such as the 75w-90..

But then in the cusco website they state a 80w-140, so all in all im more confused about what oil to get then i was before.

I looked at the Motul range (as ive heard they work great with the 2ways) however the Motul 90PA is the only one which is mineral based. the 75-140 oils are all fully synthetic.

No problem if you don't mind the extra wear and noise

Hey Steve

I am leaning towards the 80-140, 85-140 viscosity

Using an oil with such an viscosity in your diff have you found any problems when coming into tight corners or round about?

Cheers, ni

Hi Ni,

Now you are coming to what can be a frustrating but also rewarding part if owning a performance car

i.e. Knowing what suits your purpose best.

Best option IMO is do some r&d yourself - diff oil isn't too expensive, so try the 90 weight Motul, see what

you think, then try the 140 weight and do the same - that way you will know what is best for YOU

and don't be scared of synthetic oils, synthetics count amongst some of the best in the world, also, not all oils are created equal, some 140 weight oils will give alot better results than others (I have used both valvoline and a

couple of different castrols) I have also used 90 weight, but changed it

out about 2 days later cos I didn't like it

as for roundabouts/tight corners, you will most likely find the diff will lock and the tyrese chirp, or if you are just rolling around, the diff may clunk a little (I have found this is worse with lighter oil than heavier, the heavier oil quirtens down the diff - on the ones I have used anyway)

FFS its all the same! dosen't matter what brand, make sure its mineral and is suitable for LSD. Then chose your viscosity! All the viscosites mentioned in the above posts will be OK.

For gear oils most oil companys use the similar additive packs and the base oils usually come from the majors ie Mobil, Shell, BP. So any reputable brand will be fine. Dont get carried away with brand names, do you really think so called specialists like Motul, Redline, Royal Purple invest more money into research than regulars Mobil, Shell, Castrol and so on? I dont think so!

Ash

Hi Ni,

Now you are coming to what can be a frustrating but also rewarding part if owning a performance car

i.e. Knowing what suits your purpose best.

Best option IMO is do some r&d yourself - diff oil isn't too expensive, so try the 90 weight Motul, see what

you think, then try the 140 weight and do the same - that way you will know what is best for YOU

and don't be scared of synthetic oils, synthetics count amongst some of the best in the world, also, not all oils are created equal, some 140 weight oils will give alot better results than others (I have used both valvoline and a

couple of different castrols) I have also used 90 weight, but changed it

out about 2 days later cos I didn't like it

as for roundabouts/tight corners, you will most likely find the diff will lock and the tyrese chirp, or if you are just rolling around, the diff may clunk a little (I have found this is worse with lighter oil than heavier, the heavier oil quirtens down the diff - on the ones I have used anyway)

Hey dude

Thanks for all the information man, will try out a few oils and see how it goes from there.

Ni

FFS its all the same! dosen't matter what brand, make sure its mineral and is suitable for LSD. Then chose your viscosity! All the viscosites mentioned in the above posts will be OK.

For gear oils most oil companys use the similar additive packs and the base oils usually come from the majors ie Mobil, Shell, BP. So any reputable brand will be fine. Dont get carried away with brand names, do you really think so called specialists like Motul, Redline, Royal Purple invest more money into research than regulars Mobil, Shell, Castrol and so on? I dont think so!

Ash

no. i never said anything about a brand name however i read reviews and most guys on forums such as Skyaus, Hardtuned post good reviews

on the motul range, HENCE why i asked about it! not because i like the name nor care. i will go for a Mineral based oil as stated.

thanks, ni

Hey everyone

Alright guys I’m going to try two oils out.. Firstly i went for the Motul P90A because 1) there’s been positive feedback saying they are great in the Cusco 2ways and quieten them down without it slipping. 2) The original owner of the diff said he used the Kaaz 2way oil which is a 80w-90.

i will run the motul oil first, if it seems to be an issue i will change over to the higher viscosity Castrol LSX 85W 140 and try that as Steve stated.

Thanks for all your input guys

Ni

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Oof, I will forevermore have those shredded gears in mind whenever someone talks about showing mechanical sympathy towards their car. Thanks for the photos, fascinating stuff!
    • Curious to see how the SpeedTek stuff holds up
    • The holdups last year were drivetrain related. I had the car out right after getting the bearing issue resolved. Third launch and the car didn't move after releasing the clutch. It had sheared all the engagement teeth off the 1st gear.    Thankfully no other damage was done. I set an aftermarket gear beside an OEM gear and found that the engagement teeth on the OEM gear were much larger and better supported. Looking through my bin of spare transmission gears I found that there are two types of tooth on the OEM first gears - the larger tooth and the smaller tooth. It looks like most aftermarket gearset manufacturers base their design on the smaller tooth. OEM large tooth left - Speedtek, OS Giken, etc or OEM small tooth right Decided to give that larger engagement tooth a try. Pressed the ring off an OEM gear and sent it to a transmission manufacturer here in the States. They did their "faceplating" operation with my synchro ring on the Speedtek gear.   I reassembled it, took it back to the track and promptly destroyed the gear itself.  I'll rebuild this and use it as a spare - thankfully just first gear and the countershaft are damaged beyond repair. Definitely disheartening but my welded on engagement tooth ring held up!  Moved to Speedtek's dog engagement design as the gears appear to be much stronger. So far they have taken much more abuse at the track. Also scored a Stillway lockout from the Netherands for super cheap. It's for some other RB transmission so it took a bit of fabrication to fit but honestly a very easy job. I also had to heavily modify the gates as they were very different.   Then for some reason at the last test and tune a silicon coupler below the throttle blew off and took out the radiator and fan. Thankfully it was in the burnout box and not down track. This car is really beating me up - I still haven't made a pass in it. Ran it through the gears many times on the street but it keeps biting me at the track.  Currently in the process of replacing the radiator and remaking the throttle pipe to remove the coupler and use a cast 90 and a vband. I WILL get this thing down the track...
    • Covers most of the above points really. There's a few exceptions but most just see driving as an irritating but necessary task they must complete if they want to get anywhere on time. Also see it as a good time to show their awesome multi-tasking abilities on their mobile and/or doing their makeup.  
    • I don't believe I posted pictures of the second oil pump pickup I added so here they are. Data shows it gets oil pressure up to the relief pressure much earlier in the RPM. Is that important? Not likely... This was just another attempt to fix the bearing issues.   I also heavily opened up the inlet to the pump since it now had to flow oil from two pickups. I believe the diameter increased about 1/8".
×
×
  • Create New...