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2016 Mustang Differential OIl Change #4804933
07/04/18 10:14 AM
07/04/18 10:14 AM
Joined: Nov 2003
Posts: 233
Louisiana
ant Offline OP
ant  Offline OP
Joined: Nov 2003
Posts: 233
Louisiana
Time for an rear gear oil change, and the manual recommendation is Motorcraft 75w85. Would Redline in the same viscosity be a better oil to use? Could 75w90 be used, and would there be any advantage to going to the higher viscosity?

Re: 2016 Mustang Differential OIl Change [Re: ant] #4804948
07/04/18 10:29 AM
07/04/18 10:29 AM
Joined: Jul 2011
Posts: 965
Missouri
cb_13 Offline
cb_13  Offline
Joined: Jul 2011
Posts: 965
Missouri
I’m a believer in 75W140 for all rear axles.

According to MacT garage on YouTube RedLine and Valvoline synpower both have much more additives than Motorcraft gear lines. I wouldn’t say that’s a guarantee they’ll perform better but something is take into consideration.

I personally use BG gear lubes. Mostly due to the fact that the distributor will give use products for use on our personal vehicles.

Re: 2016 Mustang Differential OIl Change [Re: ant] #4804961
07/04/18 10:44 AM
07/04/18 10:44 AM
Joined: Dec 2017
Posts: 1,216
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,216
US
Redline 75w90 would be an excellent choice IMO.

I don't know about whether a 75w140 would be of benefit or not.


I'm a thickie; assimilate
But 20s have their place

Using AMSOIL™

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 41k, OE 5w20/Wix

Re: 2016 Mustang Differential OIl Change [Re: ant] #4804963
07/04/18 10:50 AM
07/04/18 10:50 AM
Joined: Sep 2010
Posts: 7,594
SE Texas
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
SE Texas
I would seriously look into Amsoil 75W-110 as a replacement for xW-85/90. 75W-110 is the viscosity of the upper range of 75W-90 was before the J306 tables were updated in 2006 (as shown below). Otherwise, I would use Amsoil 75W-140--particularly if you are tracking the car or running it very hard.




2018 MB AMG GLC43 3.0L Coupe - Castrol 0W-40/Purflux
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU
Re: 2016 Mustang Differential OIl Change [Re: ant] #4805024
07/04/18 12:24 PM
07/04/18 12:24 PM
Joined: Nov 2003
Posts: 233
Louisiana
ant Offline OP
ant  Offline OP
Joined: Nov 2003
Posts: 233
Louisiana
Usage is primarily driving to and from work, and once or twice a year at a local dragstrip. Would a 75w90 have advantage over Redline 75w85 in terms of wear?


If I change to 75w90, I would choose from the following:

Redline
Mobilube SHC (if I can find it in the USA)
Amsoil
Motul Gear 300 LS

Which of these would be the best choice?

Re: 2016 Mustang Differential OIl Change [Re: ant] #4805187
07/04/18 03:19 PM
07/04/18 03:19 PM
Joined: Aug 2009
Posts: 577
Modesto,CA
mehullica Offline
mehullica  Offline
Joined: Aug 2009
Posts: 577
Modesto,CA
Redline

Re: 2016 Mustang Differential OIl Change [Re: ant] #4805224
07/04/18 04:27 PM
07/04/18 04:27 PM
Joined: Sep 2010
Posts: 7,594
SE Texas
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
SE Texas
Originally Posted By: ant
Which of these would be the best choice?

Amsoil - PM Pablo, he can hook you up with a good deal on it.


2018 MB AMG GLC43 3.0L Coupe - Castrol 0W-40/Purflux
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU
Re: 2016 Mustang Differential OIl Change [Re: ant] #4805247
07/04/18 05:24 PM
07/04/18 05:24 PM
Joined: Oct 2016
Posts: 17
Georgia, USA
XL1200RFan Offline
XL1200RFan  Offline
Joined: Oct 2016
Posts: 17
Georgia, USA
As it happens today I'm changing the differential lube in my 2016 F-150XL 3.5L, which has the 8.8" rear end. Typically I like to dump the factory fill by 10K, refill with a quality synthetic and then leave it alone to 100K or so. This process has served me well over the last 30+ years...never a diff or wheel bearing/axle issue.

Tomorrow after the RTV cures I'll be refilling with 2 quarts of Amsoil Severe Gear 75W-110.


John

2016 F-150 3.5 CE EP 5W-20 MC FL-500S
2014 Volvo XC60 3.2 PP 5W-30 Mann HU9254Y
2003 Chevy Express 2500HD 6.0 M1 EP 5W-30 Ultra XG3506

Re: 2016 Mustang Differential OIl Change [Re: XL1200RFan] #4805336
07/04/18 08:26 PM
07/04/18 08:26 PM
Joined: Sep 2010
Posts: 7,594
SE Texas
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
SE Texas
Originally Posted By: XL1200RFan
As it happens today I'm changing the differential lube in my 2016 F-150XL 3.5L, which has the 8.8" rear end. Typically I like to dump the factory fill by 10K, refill with a quality synthetic and then leave it alone to 100K or so. This process has served me well over the last 30+ years...never a diff or wheel bearing/axle issue.

Tomorrow after the RTV cures I'll be refilling with 2 quarts of Amsoil Severe Gear 75W-110.
This is more or less the same process I use, but I will lower the OCI if I am towing frequently. I have Amsoil 75W-110 in the front axle and 75W-140 in the rear axle.


2018 MB AMG GLC43 3.0L Coupe - Castrol 0W-40/Purflux
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU
Re: 2016 Mustang Differential OIl Change [Re: ant] #4805443
07/05/18 05:16 AM
07/05/18 05:16 AM
Joined: Nov 2003
Posts: 233
Louisiana
ant Offline OP
ant  Offline OP
Joined: Nov 2003
Posts: 233
Louisiana
Any suggestion on where to purchase Mobilube SHC 75w90? I have not been able to find it on the web in the USA in the container size I need?

Re: 2016 Mustang Differential OIl Change [Re: ant] #4805468
07/05/18 06:01 AM
07/05/18 06:01 AM
Joined: Dec 2011
Posts: 4,970
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,970
North Carolina
Originally Posted By: ant
Any suggestion on where to purchase Mobilube SHC 75w90? I have not been able to find it on the web in the USA in the container size I need?

Same as Mobil Delvac 1? I get it in gallons from Grainger.


"Zed's dead baby, Zed's dead."
Re: 2016 Mustang Differential OIl Change [Re: rooflessVW] #4805812
07/05/18 11:42 AM
07/05/18 11:42 AM
Joined: May 2009
Posts: 2,285
WA (USA)
Y_K Offline
Y_K  Offline
Joined: May 2009
Posts: 2,285
WA (USA)
I think the old SHC that Prorsche liked became Delvac 1. Don't quote me on that, do your own due diligence, the SHC label has been tossed back and forth by Mobil for ages, especially in grease universe. I would call them. The Delvac 1 served me well.


"This forum talking about 4wd systems is like when other forums talk about oil."
Re: 2016 Mustang Differential OIl Change [Re: ant] #4806072
07/05/18 04:40 PM
07/05/18 04:40 PM
Joined: Nov 2003
Posts: 233
Louisiana
ant Offline OP
ant  Offline OP
Joined: Nov 2003
Posts: 233
Louisiana
What about Valvoline Synpower 75w90? How does it compare to Mobil, Redline and Amsoil?

Re: 2016 Mustang Differential OIl Change [Re: ant] #4806125
07/05/18 05:59 PM
07/05/18 05:59 PM
Joined: Sep 2010
Posts: 7,594
SE Texas
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
SE Texas
Originally Posted By: ant
What about Valvoline Synpower 75w90? How does it compare to Mobil, Redline and Amsoil?
Though I initially suggested Amsoil, based upon your intended usage:
Originally Posted By: ant
Usage is primarily driving to and from work, and once or twice a year at a local dragstrip. Would a 75w90 have advantage over Redline 75w85 in terms of wear?
In all seriousness, any oil you choose would be fine. In fact, I would look at the cheapest oil that meets specification and just change it more often than looking at a uber premium (more expensive) oil which has its strength in extended OCIs.


2018 MB AMG GLC43 3.0L Coupe - Castrol 0W-40/Purflux
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU
Re: 2016 Mustang Differential OIl Change [Re: 2015_PSD] #4806190
07/05/18 06:57 PM
07/05/18 06:57 PM
Joined: Nov 2003
Posts: 233
Louisiana
ant Offline OP
ant  Offline OP
Joined: Nov 2003
Posts: 233
Louisiana
Originally Posted By: 2015_PSD
Originally Posted By: ant
What about Valvoline Synpower 75w90? How does it compare to Mobil, Redline and Amsoil?
Though I initially suggested Amsoil, based upon your intended usage:
Originally Posted By: ant
Usage is primarily driving to and from work, and once or twice a year at a local dragstrip. Would a 75w90 have advantage over Redline 75w85 in terms of wear?
In all seriousness, any oil you choose would be fine. In fact, I would look at the cheapest oil that meets specification and just change it more often than looking at a uber premium (more expensive) oil which has its strength in extended OCIs.



You're right probably don't need the most expensive oil, just need one fit for purpose. Do you see any issue with the 75w90 given that it's 50% higher viscosity?

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