Diff Oil for the 3.45 LSD

[b2tf]

Hi all

diff oil is on the list and if you believe the marketing everybody makes the best one.

After some advice on what people have used, I am looking mainly at:

Castrol SAF-XA 80w-140

Royal Purple Max Diff Oil 75w90

Penrite SIN80 80w-140

All are synthetic and I have all of them on the shelf at work hence narrowing it down a bit.

Thanks for any info/opinions.

[stoodoo]

both myself and my brother have used the Castrol SAF-XA 80w-140 oil, my car a series 2 au ghia with a 3.45 lsd diff, my brothers a ba xr6 turbo running a 3.46 lsd diff. Can't say it's the best but neither of us have had any problems. As a matter of fact I'm about due for a diff oil change myself, I'll be buying some more saf-xa for my diff, unless more than a few people around here would recommend something else.

Cheers

[CFOUR]

my vote is for the royal purple. nothing but good things.

[WannabeXP]

I've used the Nulon LSD 80w-140 Full synthetic.
It was the cheapest available at the time.
I've heard Nulon is good stuff.
Cheers Jason

[JC]

I'd go the Nulon (and have used it in the past) - pretty sure it's the only product that doesn't need the LSD additive; everything else I think you need to use something like Penrite Limslip additive 7098.
http://www.penriteoil.com.au/product..._additive_7098

[Mechan1k]

Castrol SAF-XA does not need the additive from what i remember.
Have used the SAF-XA without issues.

[b2tf]

None of the ones I mentioned require any additives.

[Dave_Obsession]

When I investigated this a while ago for my Futura, I read many good things about the Penrite SIN80. Then my mechanic informed me it was a bit over the top and assured me my diff would be just fine with some 75w-90 stuff.......haven't had any issues.

But I was close to grabbing the SIN80.

IIRC there was some discussion about diff oils in the Mainlube sponsor forum section....

[b2tf]

The SIN80 is pretty cheap for me so I am leaning towards that. Its an easy job to do the oil change so I might grab some thru the week and do it next weekend.

[JC807]

i've put both the nulon and the penrite synthetics in my diff, no probs so far.

[Peuty]

I use the Penrite with the additive. Eliminated the chatter, no hassles since.

It's what you should be using IMO

[urbancowboy]

Interesting that no one here used the Genuine ford oil & additive,
i don't blame anyone thought its prohibitively expensive!

[mik]

i used to use the recomended ford stuff but the lsd is no longer functional, so i just use any old cheap stuff.

[blueoval]

I have SIN80 in my diff. No issues to speak of

[ebxr82nv]

Originally Posted by dave93761

When I investigated this a while ago for my Futura, I read many good things about the Penrite SIN80. Then my mechanic informed me it was a bit over the top and assured me my diff would be just fine with some 75w-90 stuff.......haven't had any issues.

But I was close to grabbing the SIN80.

IIRC there was some discussion about diff oils in the Mainlube sponsor forum section....

I had my LSD recoed by newcastle gearbox and diff and they said just to use something basic in a 75w-90 weight and get the ford motorsport additive to put in. It's not the additive available from ford that they put in the fvp's, they import it from the us because it's that good, and not that expensive. $25 a bottle and you only use half a bottle at a time.

[Polyal]

Ah what about the site sponsor mainline? Cant say Ive seen a bad post about them, actually all very good.

[madmelon]

Originally Posted by Polyal

Ah what about the site sponsor mainline? Cant say Ive seen a bad post about them, actually all very good.

That'd be Mainlube I think and if there was talk about pricing, forget it- very dear.

[Polyal]

Yeah thats them. You get what you pay for I guess...I mean how often do we change diff oil?

[Mainlube]

I guess the next question has to be ......

What's a diff worth???

Allot more the 2 litres of diff oil......even Mainlube.

I have many customers who's usage is so tuff their diff fails if Mainlube's not used, guess they don't have a problem with the cost.

Only one yard stick for quality and that's price.

What's a diff worth??

(no additive needed with Mainlube, it's a real LSD oil)

75w90 is too light for a diff, it's a gearbox oil.

Cheers

Steve

[Sorted]

I just added Penrite Limslip 140 to my Diff
I could have added Penrite LimSlip 90 but went 140 instead

I have a whine in my diff and was just seeing if that would quiten it - it didnt lol

Looked at the spec sheet and it said this:- (looks like 3 times thicker at 40 Degrees and 2 times thicked at 100 Degrees) - i think i will put LimSlip 90 back in but what MainLube product should i use and what is its cost

Its a daily driver with a few drag meetings which include Burnouts

First Numbers are LimSlip 90, then LimSlip 85W-140 then Limslip 140

Density at 40oC 0.901 - 0.912 - 0.914
Viscosity, Kinematic, cSt at 40oC 148 - 371 - 455
at 100oC 15.2 - 27.2 - 30.7
Viscosity Index 103 - 98 - 96
Viscosity, Brookfield, cSt at-26oC 136,000 - NA - NA
Viscosity, Brookfield, cSt at-12oC NA - 52,900 - NA
Colour Blue - Blue - Blue
Phosphorus, mass % 0.099 - 0.099 - 0.099

Penrite Brochure here http://www.penriteoil.com.au/pis_pdf...JAN%202010.pdf

[Mainlube]

Originally Posted by Sorted

I just added Penrite Limslip 140 to my Diff
I could have added Penrite LimSlip 90 but went 140 instead

I have a whine in my diff and was just seeing if that would quiten it - it didn't lol

Looked at the spec sheet and it said this:- (looks like 3 times thicker at 40 Degrees and 2 times thicker at 100 Degrees) - i think i will put LimSlip 90 back in but what MainLube product should i use and what is its cost

Its a daily driver with a few drag meetings which include Burnouts

First Numbers are LimSlip 90, then LimSlip 85W-140 then Limslip 140

Density at 40oC 0.901 - 0.912 - 0.914
Viscosity, Kinematic, cSt at 40oC 148 - 371 - 455
at 100oC 15.2 - 27.2 - 30.7
Viscosity Index 103 - 98 - 96
Viscosity, Brookfield, cSt at-26oC 136,000 - NA - NA
Viscosity, Brookfield, cSt at-12oC NA - 52,900 - NA
Colour Blue - Blue - Blue
Phosphorus, mass % 0.099 - 0.099 - 0.099

Penrite Brochure here http://www.penriteoil.com.au/pis_pdf...JAN%202010.pdf

Mainlube 154 Synthetic Solid Boundary E P ear Oil SAE 75w140 is $69.51 +gst per litre, first check at 60,000 then again at 100,000 klms (Free Filtergram)

Standard diff takes a little under 2 litres

196 cSt@40C
25.3 cSt@100C
over 5 times weld load with solid boundary.

Mainlube 154 Synthetic Solid Boundary E P ear Oil SAE 75w140 service bulliten is here

Cheers

Steve