Which oil to use - Salisbury with ARB?

**86mud** · 19th July 2013, 02:30 PM

Hi All

I have done a quick search but must be blind as I can not find a definitive answer. I haven't changed my diff oil (F & R) since I had my ARB air lockers fitted nearly 12 months ago.

Which grade of oil should I use? Truck is a 1998 130 300TDi.

The ARB brochure states SAE90

Is this ok or should I be using EPX80w/90

Thanks heaps

Andrew

**isuzurover** · 19th July 2013, 03:14 PM

Salisbury diffs run hot, so I tend to use 85W140 in summer and 80W90 in winter. I think Rick130 and others run 85/140 as well.

80W90 for the front diff - note it is not a salisbury.

ARB lockers are not particularly sensitive to oil.

ARB's reference literature implies an EP90 gear oil e.g. an 80W90...

**rick130** · 19th July 2013, 05:15 PM

What Ben said.

A 75/80W-90 is fine for most use but a Sals does run quite hot and if you run a HD diff cover definitely run a 80/85W-140 as the heavy covers retain a lot of heat and your bearings and CWP will thank you.

**LowRanger** · 19th July 2013, 06:10 PM

Yep 80-85/140 in all 3 of my vehicles fitted with Salisbury diffs.And 80/90 in front Rover type diffs.

**Blknight.aus** · 19th July 2013, 07:12 PM

80/90 is a good australian all rounder for the sals with the ARB locker in it...

DONT skimp on changing it, ARB have been known to knock back warranty work if the oil change interval isnt adhered to.

**Bushie** · 19th July 2013, 08:47 PM

80W-140 was specified when I had the lockers fitted. ARB specify it for heavy off road or desert use.

Martyn

**86mud** · 19th July 2013, 09:07 PM

Thanks for replies. I do have the ARB cover fitted to the Sals.

Cheers
Andrew

**rick130** · 19th July 2013, 11:21 PM

Originally Posted by 86mud

Thanks for replies. I do have the ARB cover fitted to the Sals.

Cheers
Andrew

80/85W-140 then.

**windsock** · 11th August 2013, 06:01 AM

G'day, haven't been about for a while but rather than post a new thread this one has everything I need to ask about but minus one definitive bit of info. So, I thought I'd tag my question to this thread...

My question relates to the ambient air temperature ranges for which weight of oil.

I note winter use of 80W90 has been mentioned above, as had heavy duty and desert use warrented use of 85W-140 etc. I have just recently had to fit an ARB diff cover to a conventionally geared (no locker) salisbury (110 Rover meets rock!, Rock beats Rover!). What are the ambient air temperature ranges that are likely to dictate going from a synthetic 75W-90 (Penrite ProGear that I had intended to use) to the 80W-140 oils? I can readily access Penrite 80W-140. I use Penrite 75W-90 Progear in the LT230 already so this is already on my shelf most times.

Here in the Manawatu region in NZ we get winter temps ranging from -5 to 15 usually and in summer from 15 to 28 deg C (usually).

Hope someone can assist in this as I'd hate to cook the oil in there now with the heavy cover on.

Cheers,

Phil

**rick130** · 11th August 2013, 09:37 AM

Where I am I use 80W-140 all year round and the ambient ranges from -6*,-7*C in winter (although this year has been unbelievably mild) to the high thirties in summer but I could be driving anywhere where the temps can drop lower to definitely a lot higher in summer.
A fully synthetic 80W-140 is still very fluid at those overnight temps while an 85W-140 mineral oil will be getting a little viscous and a straight SAE140 mineral oil will be like treacle.

With the ARB cover being nodular iron, I'd use the 80W-140, if it was aluminium a 75W-90 would be ok although if you aren't doing any long, high speed/high load runs or towing, a decent syn 75W-90 is a fine allrounder.

While not having logged temps on a Sals I have been daft enough to touch the old tin rear cover after a couple of hours run up the highway.
I almost left skin behind

The front Rover diff was barely above ambient.

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