Thread: Diff oil for Salisbury rear diff - whats a good oil and whats a cheap oil?

Castrol exp 80/90 is the best in my opinion cheers

any 80/90wt gear oil including kmart auto no brand name stuff will be fine for proofing, you could even use engine oil. This also applies for getting you home type stuff.

then castrol/nulon/penrite in 80/90 for routine running

If you've installed a cast iron or fabricated steel diff cover, either an API GL-5 rated diff oil (or the obsolete GL-6, which is a more extreme spec) in SAE 75/80/90W-110 (hard to find in Australia) or a 75/80/85/90W-140 viscosity.
I've run an 80W-140 oil for years. The Sals gets bloody hot, and it can't reject the heat near as quickly with a HD diff cover.

Whatever you can get from a name brand will be fine.

I do have preferences for extreme use but most GL-5/6 oils will be more than OK.

Thanks guys.

Just chugged in 3ltr's of supercheap nulon oil (Nulon Gearbox & Differential Oil - 80W-90, 1 Litre - Supercheap Auto Australia)

The new diff cover is a bit deeper than the original so holds more oil.

I've crushed some kitty litter on the concrete underneath it so any new oil drops will be visible.

Here's hoping *sigh* and thanks for your help and advice.

Originally Posted by Grizzly_Adams

I've crushed some kitty litter on the concrete underneath it so any new oil drops will be visible.

I have a container of cement (powder) in the garage to sprinkle over oil spills. Cheap and very, very effective.

I once drove over a new 5 litre container of oil with the Rangie. I quickly wiped up what I could then I spread cement. Now I can't see where the oil spill was.

I was using Castrol EPX 85-140 in the Salisbury but the last two times I drained it, the oil was like slime. You could hold it in your hand like slime and not have it drain away.

That will be the last time I use Castrol product.

Moved to Penrite which appears to be doing well so far but will be changing that for gear oil from this mob ULX110 Motor Oil

My father just had the engine in his Patrol rebuilt and the rebuilder who has a very good rep recommended their oils. Interestingly they told my Dad to never use a synthetic oil in an engine. They reckon they can pick the engines that have been running synthetic oil because of the terrible state they are in. Their advice is high quality mineral oil only.

Bit off topic sorry...

Originally Posted by steane

Interestingly they told my Dad to never use a synthetic oil in an engine. They reckon they can pick the engines that have been running synthetic oil because of the terrible state they are in. Their advice is high quality mineral oil only.

Bit off topic sorry...

Absolute bull****.

Sorry, but they know **** all about oil........