synthetic diff oil

Submitted: Wednesday, Apr 23, 2003 at 15:12
ThreadID: 4524 Views:1762 Replies:8 FollowUps:4
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can anyone advise me of a suitable synthetic oil and grade to use in the rear diff of a GU 4.2TD fitted with an air locker. Nissan dealers not willing to advise.
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Reply By: William - Wednesday, Apr 23, 2003 at 17:54

Wednesday, Apr 23, 2003 at 17:54
Look in your local phone book under Mobil and phone their technical assistance on their 1800 number.

Phone Nissan complaints on their 1800 number and complain about the dealers that will not assist you.
AnswerID: 18195

Reply By: herkman - Wednesday, Apr 23, 2003 at 19:39

Wednesday, Apr 23, 2003 at 19:39
We need to clear up the difference between a fully synthetic oil, and a sythetic enhanced oil. There is a big difference between the two.

You often really have to back the oil companies into a corner, to find out.

To my knowledge there are two for sure who make fully synthetic oils, that being Fuch's whose head office is in Melbourne, and Shell who you can ring on 1300134799.

I have good reason to suspect that Mobil no longer makes fully synthetic, and most certainly neither does Castrol.

You also need to advise the oil company, if your truck has a LSD.

Regards

Col Tigwell
AnswerID: 18214

Follow Up By: William - Wednesday, Apr 23, 2003 at 21:23

Wednesday, Apr 23, 2003 at 21:23
Herkman Mobil are the technology leaders in synthetic oil and make the base product for the large majority of other companies.

To date no other company has come up with synthetic oil that meets or exceeds Mobil synthetics. Wild claims and ficticious graphs without brand names to try and show their oil is supposed to be great, but to chicken to state and show the brand names and products they tested against.
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Reply By: Member - Topcat - Wednesday, Apr 23, 2003 at 21:05

Wednesday, Apr 23, 2003 at 21:05
Hi Stevo, you can try Red Line & their product is 100% synthetic, but be prepared to pay the price for it. On average their Red Line 75W90 Gear Oil retails around the $110 mark for a Gallon(US) container (3.7 liters), but they say you will never have to do another oil change again if your diff in good condition to start with. They supply all Coventry Stores throughout Australia with their business centre in Osbourne Park W.A.
Telephone (08) 9446 4455. Cheers.Have Wheels Will Travel
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Follow Up By: William - Wednesday, Apr 23, 2003 at 21:26

Wednesday, Apr 23, 2003 at 21:26
Why would you pay so much for a backyard packaged product when you can have a reliable oil company backed brand name. None of these backyard packaging operators produce one drop of the product, they just repackage usually lower standard product bought in from one of the major oil companies.
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Follow Up By: Allyn (Pilbara) - Thursday, Apr 24, 2003 at 03:39

Thursday, Apr 24, 2003 at 03:39
I may stand corrected on this William but I don't think Redline would actually fall into the backyard category.
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FollowupID: 11449

Reply By: herkman - Thursday, Apr 24, 2003 at 07:01

Thursday, Apr 24, 2003 at 07:01
Firstly I would like to state, that I have been using Mobil 1, since it first came to Australia with good results.

However I have now changed to Fuch's oils, because with my last talk with Mobil, I got the run around in regard to whether their oil, was to remain as a fully synthetic oil, or had become a synthetic enhanced oil.

There is a big difference between the two.

The court case last year, where Mobil took Castrol to court, over the fact that Magnatec is not a synthetic oil (it is not a fully synthetic oil) and should be not advertised as such.

Mobil lost the case, and the court ruled that a synthetic enhanced oil, may be advertised as a synthetic oil.

My understanding is that the Mobil 1 tri synthetic oil is is still a good oil, but on web sites in the USA, it appears as if Mobil has downgraded the specs on 5W50 range.

I would not consider either Redline or Amsol, as being backyard companies.

Even with synthetic type oils, you will normally get the best protection, from the best speced product, which of course is not the enhanced types.

Regards

Col Tigwell
AnswerID: 18257

Reply By: Stevo - Thursday, Apr 24, 2003 at 08:37

Thursday, Apr 24, 2003 at 08:37
Thanks for your responses folks but after talking to oil companies I am non the wiser in regards to what grade of oil I should use. Nissan specify 80W 90 for Nissan open diffs, Mobil recommend 75 140W for the same use and Lubrimaxx recommend 75W 90.
So what the #@!% do I use ??
AnswerID: 18260

Reply By: bazzle - Thursday, Apr 24, 2003 at 08:54

Thursday, Apr 24, 2003 at 08:54
Your diff will be ok with any of the oils recommended.
Shell spirax 75w 90 is a suitable synthetic.

LSD oil is ok but normal grade as above is better.

Bazzle
AnswerID: 18263

Follow Up By: Stevo - Thursday, Apr 24, 2003 at 09:05

Thursday, Apr 24, 2003 at 09:05
Thanks Bazzle.
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Reply By: Alan H - Thursday, Apr 24, 2003 at 12:39

Thursday, Apr 24, 2003 at 12:39
This bit of info. may help some of those whose vehicles engines, like mine, now run on synthetics from new. Mercedes Benz in the US just lost a case against owners of their vehicles who changed over to mineral oils and suffered very bad engine wear as a result.
It cost MB around $US20 million to fix the problems, not much to them I suppose but it certainly helped the owners who weren't advised of the possible consequncies of the change.
AnswerID: 18285

Reply By: colin - Saturday, Apr 26, 2003 at 12:01

Saturday, Apr 26, 2003 at 12:01
hi stevo, talk to a diff mechanic, he will give the best advice, i did and was told penrite lsd oil was best for my gq, only thing to rember is that most lsd oils are self depleteing and have to be changed regulary , my vehicle has done 260000ks and have had no probs at all. Col
AnswerID: 18383

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