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Diff Oil

Hulk1010

By Hulk1010,
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khunjeng Veteran

khunjeng

Posted
Posted
instead of wasting your money on expensive redline which wont' do anything, because your diff is viscious (separate fluid for the viscous), I would honestly, use a castrol fluid.

Castrol lsx90. Cost ya about $30 for a 4L big bottle. You'll need 1.8L.

Castrol oils are a fairly good place to start from. At least it'll be correct.

Then, see how it feels, if it's good, then fine, it's good. From there, if you have a problem, then go mucking around with different fluids.

I have a mech diff, so I'm using motul oil, just so it changes the properties (won't do much to a viscous).

For the VLSDs used in GTSTs...the castrol Syntrax 75W90 is a good product...GL5 rated. Bit more expensive but great.

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MANWHORE Grand Master

MANWHORE

Posted
Posted

My questino for you is WHY (no pun or offence intended, just seeking information)?

Why use a gearbox oil in an LSD? The LSD should be using LSD oil with friction modifiers (yes I am aware that vlsd haev a separate oil/transfer fluid).

Why use a synthetic oil that will essentially be more slippery, when you want it to grip more?

Why waste money on something that is not required? Essentially the syntrax is $30 a litre rrp as opposed to about $8 a litre rrp for the lsx90 (trade price is a bit cheaper)

PS: In a gearbox, I can see the benefit of using the syntrax synthetic as opposed to the vmx80.

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khunjeng Veteran

khunjeng

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In a true LSD, i.e. non VLSD you would use a friction modifed gear oil. The GTST stock runs a VLSD so you dont require the friction modifiers.

LSX90 is a LSD friction modified mineral base oil.

For a VLSD..gb oil is fine. Syntrax is a high quality 75W-90 syn oil and is suitable.

considering its like 1.2 litres and stays there for ages then I choose Syntrax for my GTST. Syn oil and "slippery" is a crock and its more about the oils resistance to sheer under high pressure and temps. The SAE rating will determine ur viscosity.

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MANWHORE Grand Master

MANWHORE

Posted
Posted

It's actually 1.8L, well, for my car it is anyways.

But I have always subscribed to the theory that changing oil more frequently is more important as opposed to running a more expensive oil.

e.g. have you dropped your diff oil after about 10000ks?

Depending on how you drive, I always find that my oil is all burnt and gross. My car is not a daily driver though, so I don't drive it normally etc.

I have no problem using the lsx90. I'd rather buy lsx90, comes in a big 4L bottle. I change it once a year, so the oil is nice and fresh.

That is, opposed to putting in synthetic oil, and leavin git for the time in the manual (like 40 k ks or somethign from memory)

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Kinks Grand Master

Kinks

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Posted
But I have always subscribed to the theory that changing oil more frequently is more important as opposed to running a more expensive oil.

there's no point in using ANY oil past the point at which it starts to break down. however, that might be 3000km for a mineral oil, 5000km for a basic synthetic or 10,000km for a top shelf synthetic. so if you buy a cheaper oil you will have to change it more often anyway.

i'd rather buy good quality, full synth oil and change it "often enough". grab a sample of basic mineral oil (GTX3) and a good synth oil, and rub each one between your fingers. the full synth one is a LOT slipperier.

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khunjeng Veteran

khunjeng

Posted
Posted
It's actually 1.8L, well, for my car it is anyways.

But I have always subscribed to the theory that changing oil more frequently is more important as opposed to running a more expensive oil.

e.g. have you dropped your diff oil after about 10000ks?

Depending on how you drive, I always find that my oil is all burnt and gross. My car is not a daily driver though, so I don't drive it normally etc.

I have no problem using the lsx90. I'd rather buy lsx90, comes in a big 4L bottle. I change it once a year, so the oil is nice and fresh.

That is, opposed to putting in synthetic oil, and leavin git for the time in the manual (like 40 k ks or somethign from memory)

Personal prefernce. I will change it every year also with the good stuff maybe more sometime cos I get bored. I dont give a toss if it costs me an extra $40/50 or even $100 a year.

I do UOAs on my oil and have used these to detmine what is a. a good oil and b. how long to run it unde rmy driving conditions.

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  • 1 year later...
Excess Proficient

Excess

Posted
Posted
It's actually 1.8L, well, for my car it is anyways.

But I have always subscribed to the theory that changing oil more frequently is more important as opposed to running a more expensive oil.

e.g. have you dropped your diff oil after about 10000ks?

Depending on how you drive, I always find that my oil is all burnt and gross. My car is not a daily driver though, so I don't drive it normally etc.

I have no problem using the lsx90. I'd rather buy lsx90, comes in a big 4L bottle. I change it once a year, so the oil is nice and fresh.

That is, opposed to putting in synthetic oil, and leavin git for the time in the manual (like 40 k ks or somethign from memory)

so i shouldnt be using the redline shockproof in the Diff?

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