GKN Dif oil change

[tom's dad]

I am wanting to change the diff oil on my 92 Griff. The owners manual states that it should be HD90/SAE 85W90. Is this the same or equivalent oil as Mobilube HD-A 85W90 listed on the Mobil site. If not what oil should I be using.

[spend]

Make sure its @80W but particularly LSD specific oil IIRC. Joo always used to have nice Millers stuff that I used.

Dave

[350Matt]

How often should this stuff be changed anyway?

Matt

[spend]

I don't do massive miles, so I change every 2 years - mainly as a sanity check so I can filter to see if anything is breaking & clean the magnetic plug. Only recently acquired a spare diff so I have been a bit paranoid about killing it (I try in other ways ). I even drained & strained one year just to be sure...

Dave

[griffter]

350Matt said:

How often should this stuff be changed anyway?

Matt

2 years / 12k on the service schedule.

[350Matt]

probably should do mine then, based on everything else I've found its probably not been touched for ages....

Matt