diff oil which oil?
Submitted: Friday, Sep 24, 2004 at 17:59
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Davoe
seeing as I got such good responses to my q on changing diff oil I thought I would ask what viscosity? 80/90 would be the logical starting point but my auto patrs retailer insists that I would be better off woth the next viscosity up (I think it is 90/120) his reason is that it is a 3 tonne campervan running hj75 diffs (before the front ones shrunk) and the constant load would be better served with thicker oil. I would dismiss him as a counter jockey but he seems quite knowledgable and performed the inspection on the campervan.
Reply By: Rossco100series - Friday, Sep 24, 2004 at 20:00
Friday, Sep 24, 2004 at 20:00
Dave try www.shell.com.au and go to lube recommendations 90w/120 is to thick I use 75w/90 XGO ( shell ) which is full synthetic. Using oil that is not recommended for the vehicle can leed to problems. The only time I have used oil that thick was in my old HSV Clubsport V8 but that was Holden recommendation and that is the only time.
Dave even try www.castrol.com.au or www.
mobil.com.au or www.bleeps.com.au there are more site's but the info these have should put you on the right track.
Rossco
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Follow Up By: Davoe - Friday, Sep 24, 2004 at 20:06
Friday, Sep 24, 2004 at 20:06
I would be happy to go with the oil I used last time penz 80/90 except for what the auto parts guy told me. I am no mechanic but I am worried thicker oil may not lubricate
well when cold as the higher viscosity wont allow it to splash around
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Follow Up By: Davoe - Friday, Sep 24, 2004 at 20:13
Friday, Sep 24, 2004 at 20:13
hmmmmm shell website said to use 90ls on the back and front diffs - doesnt sound right to me some usefull info though ta
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Follow Up By: banjodog - Saturday, Sep 25, 2004 at 06:09
Saturday, Sep 25, 2004 at 06:09
Some years ago I arranged a Castrol rep to do a presentation to our staff. He went through all the Castrol product range - brake fluid to the hypoid oils.
One comment that has always stuck in my mind was the one about diff oils - "If at all possible use the LSD 90 oil for the standard open diffs as it has a better lubricating factor when compared to the standard 85/140 grade".
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