M3 LSD Oil - what is the spec?

[Paulsimon8]

Can anyone please enlighten me asto what the correct oil is for the E30 M3 LSD?

Virtual pint to the man who tells me

[Paulsimon8]

surely someone knows which oil to put in an lsd

[Demlotcrew]

i think its like 75w80 and its must be good for hypoid gears and have a LSD additive.

But i cant remember off the top of my head.


Andrew

[DanThe]

I used Castrol B373, SAE 90 in mine. About £5 per litre, high pressure mineral based

The dealers use Castrol SAF-XJ, SAE 75W-140. Ive heard of people paying upto £22 per litre for this stuff though but it is fully synthetic


Or you can get Comma LSD oil from any decent motor factors at about £3 per litre

HTH

[M3Compact]

SAF-XJ is the modern BMW recommendation, when the car was built B373 was the BMW spec' oil. I've used B373 in dozens of these diffs without problem.

£4 a litre V £17 a litre, you pays your money and takes your choice.

[Paulsimon8]

Cheers people

Next question - how much oil is needed to fill the diff to the level it is normally at, from empty (IE, a fresh oil change)

[stuartgallafant]

i've always used Castrol SAF-XJ for my LSD's, but thats only coz i half-inch from work!!

for a large case diff, i think its 1.7 litres, and small case diff is 1 litre

[Paulsimon8]

Cheers boys