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Amsoil vs Motorcraft gear oil #4682417
03/02/18 04:08 PM
03/02/18 04:08 PM
Joined: Dec 2002
Posts: 4,147
The Garden State
Whimsey Offline OP
Whimsey  Offline OP
Joined: Dec 2002
Posts: 4,147
The Garden State
We have a 2017 4WD 2.3 EB Explorer. We intend to keep it 10+ years as we do all our vehicles. The PTU, Ford's new style transfer case, requires synthetic 75W-140 gear oil and the RDU, rear differential specs 80W-90 non synthetic gear oil. Both are Motorcraft gear oils and both are "Life Time" fills supposedly. From what I've seen the PTU can turn the Motorcraft synthetic 75W-140 into black cake in as little as 30,000 miles or less rendering the PTU unit useless and broken. For long term life I've always changed the rear diff in the past, at least by 30,000 miles with synthetic gear oil. I'm wondering whether Amsoil's Severe Gear 75W-140 for the PTU and 75w-90 gear oil would be more beneficial than the Motorcraft gear oils spec'd. For the rear diff I can use Amsoil 80W-90 synthetic gear oil also if the Severe Gear 75W-90 is not appropriate. Thanks!

Whimsey

Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4682448
03/02/18 04:51 PM
03/02/18 04:51 PM
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
Heat and low oil capacity of the PTU really thrashes the oil.

I would recommend the Amsoil SG 75W140 for the PTU and the SG 75W90 for the rear differential.


Reading is fundamental; understanding is not a given ability.
Re: Amsoil vs Motorcraft gear oil [Re: MolaKule] #4682500
03/02/18 05:48 PM
03/02/18 05:48 PM
Joined: Dec 2002
Posts: 4,147
The Garden State
Whimsey Offline OP
Whimsey  Offline OP
Joined: Dec 2002
Posts: 4,147
The Garden State
Originally Posted By: MolaKule
Heat and low oil capacity of the PTU really thrashes the oil.

I would recommend the Amsoil SG 75W140 for the PTU and the SG 75W90 for the rear differential.


Thanks MolaKule! I've respected your opinion for 15+ years and continue to do so. Many thanks for all your help and knowledge over all these years.

Whimsey

Re: Amsoil vs Motorcraft gear oil [Re: MolaKule] #4682561
03/02/18 06:39 PM
03/02/18 06:39 PM
Joined: Aug 2012
Posts: 3,041
Cincinnati
donnyj08 Offline
donnyj08  Offline
Joined: Aug 2012
Posts: 3,041
Cincinnati
Originally Posted By: MolaKule
Heat and low oil capacity of the PTU really thrashes the oil.

I would recommend the Amsoil SG 75W140 for the PTU and the SG 75W90 for the rear differential.


What he said ^ if you have warranty concerns use the above grades in the Motorcraft oil.

If it were mine id change the PTU fluid annually NTE 25k miles.

Last edited by donnyj08; 03/02/18 06:40 PM.

2008 Silverado Z71 LT 90k Maxlife FS 5w30
2010 Ford Escape 172k QSUD 5w20
2016 Yamaha XSR900 12k, Rotella 15w40 Yamaha Filter.
Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4682679
03/02/18 08:54 PM
03/02/18 08:54 PM
Joined: Aug 2010
Posts: 1,008
pa
benjy Offline
benjy  Offline
Joined: Aug 2010
Posts: 1,008
pa
the amsoil is likely better, but Redline lubricants are even better IMO! Amsoil products are only as good as needed as they answer NOTHING about their formulations + only say they meet or exceed the OE. they quit blowing their PAO horn some time ago + are likely formulating better than average but not as good as before products IMO!!

Re: Amsoil vs Motorcraft gear oil [Re: MolaKule] #4682689
03/02/18 09:08 PM
03/02/18 09:08 PM
Joined: May 2012
Posts: 953
Rio Rancho, NM
Pajero Offline
Pajero  Offline
Joined: May 2012
Posts: 953
Rio Rancho, NM
Originally Posted By: MolaKule
Heat and low oil capacity of the PTU really thrashes the oil.

I would recommend the Amsoil SG 75W140 for the PTU and the SG 75W90 for the rear differential.


Doctor knows best! Amsoil makes great Gear lube, just bought a bunch from Pablo here on BITOG. When people with experience and PHD's make recommendations, I'm all ears!

*I don't know Pablo, only from these forums.....I don't sell Amsoil either... OP please read my signature.


Respectfully,

Pajero!


Always remember "Planned obsolescence."

1994 Montero SR 3.5 DOHC, 133,xxx
Fram Ultra/ Snorkel with Pre-filter
K-9-Co-pilot
Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4682742
03/02/18 09:56 PM
03/02/18 09:56 PM
Joined: Dec 2006
Posts: 18,615
Dallas,Tx USA
aquariuscsm Offline
aquariuscsm  Offline
Joined: Dec 2006
Posts: 18,615
Dallas,Tx USA
Amsoil Severe Gear,end thread.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 5W20

Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4683017
03/03/18 09:32 AM
03/03/18 09:32 AM
Joined: Sep 2015
Posts: 2,256
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,256
Malaysia
Originally Posted By: Whimsey
I'm wondering whether Amsoil's Severe Gear 75W-140 for the PTU and 75w-90 gear oil would be more beneficial than the Motorcraft gear oils spec'd. For the rear diff I can use Amsoil 80W-90 synthetic gear oil also if the Severe Gear 75W-90 is not appropriate. Thanks!

A differential mineral 80W90 typically has a [email protected]*C of 135-165 cSt, i.e an ISO 150 gear oil grade.
Now I would speculate a Ford mineral 80W90 has a [email protected]*C of about 146 cSt.
Amsoil SS 75W90 has a [email protected]*C that is too low at 102.4 cSt, falling into (lower) ISO 100 grade.
Amsoil synthetic 80W90 has a [email protected]*C of 120.2 cSt, which is in between ISO 100 and ISO 150 gradings.
If you must replace Ford differential mineral 80W90 with an Amsoil, I would recommend Amsoil SS 75W110 that has a [email protected]*C of 139.9 cSt which matches an ISO 150 gear oil grade.

Amsoil 75W140 should be an equivalent replacement for Ford 75W140 in a PTU.JMHO

Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4683082
03/03/18 11:01 AM
03/03/18 11:01 AM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: Whimsey
From what I've seen the PTU can turn the Motorcraft synthetic 75W-140 into black cake in as little as 30,000 miles or less rendering the PTU unit useless and broken.


WOW!!

Change it at 15,000, then at 20,000, then 25,000 - to see how yours behaves.

I wouldn't take chances


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Amsoil vs Motorcraft gear oil [Re: Linctex] #4683134
03/03/18 11:53 AM
03/03/18 11:53 AM
Joined: Dec 2002
Posts: 4,147
The Garden State
Whimsey Offline OP
Whimsey  Offline OP
Joined: Dec 2002
Posts: 4,147
The Garden State
Originally Posted By: Linctex
Originally Posted By: Whimsey
From what I've seen the PTU can turn the Motorcraft synthetic 75W-140 into black cake in as little as 30,000 miles or less rendering the PTU unit useless and broken.


WOW!!

Change it at 15,000, then at 20,000, then 25,000 - to see how yours behaves.

I wouldn't take chances

I had the dealer change it at 9,000 miles, of course they used Motorcraft 75W-140. My next change will be at approx 25,000 mi using the Amsoil SG 75W-140. Then I'll do it again at approx 50,000 miles to see how the Amsoil SG holds up and then decide on the change frequency. And Ford calls this a "lifetime fill" in the PTU mad.

Whimsey

Last edited by Whimsey; 03/03/18 11:56 AM.
Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4683171
03/03/18 12:44 PM
03/03/18 12:44 PM
Joined: Sep 2010
Posts: 6,987
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 6,987
Texas
Originally Posted By: Whimsey
Originally Posted By: Linctex
Originally Posted By: Whimsey
From what I've seen the PTU can turn the Motorcraft synthetic 75W-140 into black cake in as little as 30,000 miles or less rendering the PTU unit useless and broken.


WOW!!

Change it at 15,000, then at 20,000, then 25,000 - to see how yours behaves.

I wouldn't take chances

I had the dealer change it at 9,000 miles, of course they used Motorcraft 75W-140. My next change will be at approx 25,000 mi using the Amsoil SG 75W-140. Then I'll do it again at approx 50,000 miles to see how the Amsoil SG holds up and then decide on the change frequency. And Ford calls this a "lifetime fill" in the PTU mad.

Whimsey


Do you have room for a Fumoto valve… figured you could drain and then batch inject with super syringe …
Has to be better than gurgling a 1/4” air hose … but that hose would easily facilitate the above (ventilation)
It would require the ‘N’ valve to stick hose on …

Re: Amsoil vs Motorcraft gear oil [Re: 4WD] #4683251
03/03/18 03:00 PM
03/03/18 03:00 PM
Joined: Dec 2002
Posts: 4,147
The Garden State
Whimsey Offline OP
Whimsey  Offline OP
Joined: Dec 2002
Posts: 4,147
The Garden State
Thanks for the suggestion. Next time I'm under the Explorer I'll take a look and see if this is feasible. Of course the snow and ice have to melt before I do that LOL.

Whimsey

Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4683588
03/03/18 08:53 PM
03/03/18 08:53 PM
Joined: Aug 2011
Posts: 2,091
Appleton, WI
threeputtpar Offline
threeputtpar  Offline
Joined: Aug 2011
Posts: 2,091
Appleton, WI
I had a 2008 Taurus X AWD and had to deal with a gunked up PTU. I realize that yours is far newer and probably in decent shape, but I think my recommendation still holds water.

I used Schaeffer's 75W-140 meant for Harley motorcycle gear cases. From my research I thought it was the best available option to withstand the heat of the catalytic converter 4 inches away, plus I had a distributor 15 minutes away from me that kept it in stock for $15/quart.

I also drill and tapped a drain plug in the PTU to make the changes far easier (I think I posted here on the Edge forum). Even with a fluid extractor and a small rigid tube it was very difficult to get any of the old gear oil out. Some Edge owner even fabricated a heat shield to help dissipate heat.


2013 Honda Odyssey Touring Elite - Citgo Syngard 0W-20 / Carquest Blue 68k miles
2005 Audi allroad - Valvoline 5W-40 MST / Carquest Blue 218k miles
Re: Amsoil vs Motorcraft gear oil [Re: Whimsey] #4689340
03/09/18 07:36 AM
03/09/18 07:36 AM
Joined: Nov 2006
Posts: 1,014
Long Island, NY
Drew2000 Offline
Drew2000  Offline
Joined: Nov 2006
Posts: 1,014
Long Island, NY
How does Mobil 1 75w140 compare to the other brands? I have a quart and plan on using this in the PTU next oil change.


17Escape 2.0
11Mustang GT
06Tribute
05Honda ST1300
03Yamaha FZ1
93Regal
91Explorer
87F250
85FJ1100
83CB650

Re: Amsoil vs Motorcraft gear oil [Re: Drew2000] #4689509
03/09/18 11:54 AM
03/09/18 11:54 AM
Joined: Dec 2002
Posts: 4,147
The Garden State
Whimsey Offline OP
Whimsey  Offline OP
Joined: Dec 2002
Posts: 4,147
The Garden State
Originally Posted By: Drew2000
How does Mobil 1 75w140 compare to the other brands? I have a quart and plan on using this in the PTU next oil change.


It won't do any worse than the Motorcraft 75W-140 that Ford uses. In fact it may hold upper better because it probably has PAO in it and not just Group lll as the Motorcraft probably is made of. Nothing wrong with Motorcraft 75W-140 in their rear diffs of their trucks, it held up well for me and so did Mobil1 75W-140. The "uniqueness" of the PTU and it's location necessitates a real stout 75W-140. Have you changed your PTU before and do you have any helpful suggestions? Thanks.

Whimsey

Last edited by Whimsey; 03/09/18 11:55 AM.
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