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Amsoil 75W-90 (uoa), Nissan murano z51, transfer gear box 16858km(10475mi) #5333971 01/27/20 06:11 PM
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veev2 Offline OP
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AMSOIL Severe Gear Synthetic Extreme Pressure 75W-90 working out of the transfer case of the Nissan murano z51 vq35de after 16858 km(10475mi).

Transmission oil: AMSOIL Severe Gear Synthetic Extreme Pressure 75W-90 (art. SVGQT)
Cars: Nissan murano z51 V6 3.5 vq35de
Total mileage: 163,991 km
Mileage on oil: 16858 km
Service life: August - January.
Mode: 65% city, 35% track
Volume of oil to be poured: ≈330 ml
Oil selection: everything that has drained through the drain plug.
Additives: no
Previous oils:
120500-134971km, Idemitsu GL-5 80W90,
134971-147111 km, ZIC GFT 75W-90 API GL-4/5,
147111 - 147133 km, ZIC GFT 75W-90 API GL-4/5 (flushing with fresh oil)
147133-163991 km, analyzed oil AMSOIL Severe Gear Synthetic Extreme Pressure 75W-90 (art. SVGQT)
[Linked Image]
Silicon from the sealant, this time it turned out somehow strongly with excess (((+ contamination during discharge.

Re: Amsoil 75W-90 (uoa), Nissan murano z51, transfer gear box 16858km(10475mi) [Re: veev2] #5334502 01/28/20 10:10 AM
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gathermewool Online Content
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Viscosity looks good, though I thought it would end a little thicker ([email protected])

Flashpoint: is that the "172" number at the bottom? If so, that seems low, though I don't think that matters much in a diff.

Re: additives: who knows what Amsoil uses that we're not seeing here? I haven't looked at a GL UOA in a bit, but the additives look a little light to me. Boron and especially Phosphorous stand out to me as being low. Must be a GL-4/5 lube?

Is GL-5 prohibited in most transfer cases?


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Re: Amsoil 75W-90 (uoa), Nissan murano z51, transfer gear box 16858km(10475mi) [Re: veev2] #5334556 01/28/20 11:21 AM
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The later Nissan transfer cases do spec a 75W90 GL-5 fluid, and because of the small volume, they do need to be changed frequently.

My 2012 Frontier's TC case specifies a 7.5 cSt ATF (NissanMatic D).


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Re: Amsoil 75W-90 (uoa), Nissan murano z51, transfer gear box 16858km(10475mi) [Re: gathermewool] #5334785 01/28/20 04:43 PM
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172 - viscosity index. Flash point not indicated. Yes, I was also surprised that the additive package is so easy. But despite this, Amsoil (in terms of wear) worked twice as good as the previous oil (ZIC GFT 75W-90, base from PAO and esters ≈5-10%, KV40≈77cSt,kv100≈14.5cSt). Oil mileage ZIC GFT 75W-90 ≈14500km. [img]https://hostingkartinok.com/show-image.php?id=528298127eb08037d3ed15bc90ba774b[/img]

Re: Amsoil 75W-90 (uoa), Nissan murano z51, transfer gear box 16858km(10475mi) [Re: veev2] #5335015 01/28/20 10:39 PM
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You're basing that on Fe numbers, right? I wouldn't necessarily call the UOA Fe number decreasing by half as "twice as good as the previous oil." I don't think it works that way.


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Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: Amsoil 75W-90 (uoa), Nissan murano z51, transfer gear box 16858km(10475mi) [Re: veev2] #5335118 01/29/20 04:47 AM
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This analysis(Amsoil UOA) also determined the mass fraction of mechanical
impurities (ГОСТ 6370). Result: no.

Honestly, I don’t know what other parameter (besides the amount of iron (and other metals indicating wear) in the used oil) can be used in the analysis to determine wear?

(I read your forum through a translator, so the meaning and meaning of the written is often distorted.)
If it’s not difficult, tell me briefly what other parameter (from the available in UOA) you need to pay attention to?

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