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Dino or Synthetic for Differentials? #4570338
11/10/17 09:18 PM
11/10/17 09:18 PM
Joined: Sep 2002
Posts: 2,385
VA
Gebo Offline OP
Gebo  Offline OP
Joined: Sep 2002
Posts: 2,385
VA
I just read a post in this forum where a very knowledgeable person said that the "Golden Rule was to use Dino in the Rear." That really got my attention. I want to know more about this. Anybody got time for their input? I have a teachable spirit....


'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 60K
Amsoil in all engines, transmissions and differentials

Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570341
11/10/17 09:22 PM
11/10/17 09:22 PM
Joined: Apr 2017
Posts: 437
TN USA
Crispysea Offline
Crispysea  Offline
Joined: Apr 2017
Posts: 437
TN USA
I used dino on my diff because it cost half as much. It works fine. I dont see much of a need for synthetic unless you pull heavy loads constantly.

Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570342
11/10/17 09:24 PM
11/10/17 09:24 PM
Joined: Sep 2002
Posts: 2,385
VA
Gebo Offline OP
Gebo  Offline OP
Joined: Sep 2002
Posts: 2,385
VA
I'm being serious, not smart aleck. Does that make it the "golden rule"? Are there chemical properties in dino that make it superior in a rear end?


'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 60K
Amsoil in all engines, transmissions and differentials

Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570349
11/10/17 09:40 PM
11/10/17 09:40 PM
Joined: Nov 2013
Posts: 1,156
UT
BHopkins Offline
BHopkins  Offline
Joined: Nov 2013
Posts: 1,156
UT
I have never heard about the Golden Rule for differential fluids. However, I would never use anything but a synthetic in a differential in a cold weather climate. This isn't the video I was looking at, but it demonstrates the difference between a dino and a synthetic diff fluid in cold weather. While the synthetic is a 75W and the dino is an 80W, the dino still doesn't offer flow like it should, even when it reaches the temperature where it is supposed to start working.

https://www.youtube.com/watch?v=fuwunDgEVMs


2013 Subaru Outback 2.5i - Idemitsu 0W-20 & Mobil 1 filter
2007 Mercedes SL550 - M1M 5W-40 & MB OEM filter
Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570355
11/10/17 09:51 PM
11/10/17 09:51 PM
Joined: Jul 2007
Posts: 4,340
Midwest USA
LoneRanger Offline
LoneRanger  Offline
Joined: Jul 2007
Posts: 4,340
Midwest USA
Dino (conventional) adheres to the gears better than synthetic.



'09 Subaru Forester ...................(QS HM 5W30)
'16 Moto Guzzi Stelvio 1200 .....(ENI i-Ride PG 10W60)
Re: Dino or Synthetic for Differentials? [Re: LoneRanger] #4570371
11/10/17 10:09 PM
11/10/17 10:09 PM
Joined: Sep 2010
Posts: 7,594
Planet Earth
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,594
Planet Earth
Originally Posted By: LoneRanger
Dino (conventional) adheres to the gears better than synthetic.
Based upon what? Any factual information to share to substantiate this statement?

Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570394
11/10/17 10:42 PM
11/10/17 10:42 PM
Joined: Aug 2008
Posts: 21,307
ON, Canada eh?
StevieC Offline
StevieC  Offline
Joined: Aug 2008
Posts: 21,307
ON, Canada eh?
IMO, if it's a regular use rear-end and not for towing or hauling heavy loads I would use conventional at the right viscosity recommended by the manufacturer for the climate it's operated in. Otherwise I would go to synthetic for higher heat applications.

Dino does not "adhere" better to anything unless you are talking about deposits in an engine. grin2


Last edited by StevieC; 11/10/17 10:44 PM.

'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: Dino or Synthetic for Differentials? [Re: LoneRanger] #4570399
11/10/17 10:48 PM
11/10/17 10:48 PM
Joined: Sep 2010
Posts: 7,494
Texas & Global
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,494
Texas & Global
Synthetic adheres to that little book that comes in the glove box some may have noticed OEMs spec synthetic in gear sets before it became more common in the ICE


2018 Chevy 1500 Z71 4WD
2017 Chevy Tahoe LT 4WD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ - RS Turbo
Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570463
11/11/17 04:09 AM
11/11/17 04:09 AM
Joined: Sep 2013
Posts: 10,683
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,683
Indiana
It boils down to a.) following your owners manual and b.) personal preference.

That said, I wouldn't think dino vs. synthetic would be backwards compatible.


03 Jeep WJ 4.0 202k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570473
11/11/17 04:33 AM
11/11/17 04:33 AM
Joined: Sep 2015
Posts: 3,939
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,939
Connecticut
Some differentials require conventional....such as Auburns with cone clutches.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570502
11/11/17 05:23 AM
11/11/17 05:23 AM
Joined: Oct 2008
Posts: 12,649
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,649
The Old North State
Never heard of that golden rule. Currently running Castrol Syntrax 75w90 Synthetic in an 01 Tacoma with OM spec of 80w90 dino. Purchased on AZ close out <$5 a bottle. Guess that means that's one 'golden rule' I won't be observing.

Re: Dino or Synthetic for Differentials? [Re: 69GTX] #4570510
11/11/17 05:36 AM
11/11/17 05:36 AM
Joined: Feb 2009
Posts: 1,585
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,585
wv
I think the real 'golden rule' for differentials is to have the proper levels of lubrication.


Here is a decent thread from a few yrs ago.

https://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1472615

Re: Dino or Synthetic for Differentials? [Re: 69GTX] #4570511
11/11/17 05:42 AM
11/11/17 05:42 AM
Joined: Sep 2013
Posts: 10,683
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,683
Indiana
Originally Posted By: 69GTX
Some differentials require conventional....such as Auburns with cone clutches.


You made BITOG's first frog hair splitting post of the day. laugh

How many members does this post apply to anyways?


03 Jeep WJ 4.0 202k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570520
11/11/17 05:59 AM
11/11/17 05:59 AM
Joined: Oct 2010
Posts: 5,410
Florida
Artem Offline
Artem  Offline
Joined: Oct 2010
Posts: 5,410
Florida
Depending on the type of rust bucket you're servicing... "The Best or its pointless" <-- consider that the Platinum Rule.


2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart. (thanks Advance Auto Parts for the awesome deal)
Re: Dino or Synthetic for Differentials? [Re: Gebo] #4570532
11/11/17 06:21 AM
11/11/17 06:21 AM
Joined: Sep 2015
Posts: 2,474
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,474
Malaysia
It's the [email protected]*C that matters.
Oh yes, dino has higher pressure-viscosity coefficient than synthetics god in PAO's providing thicker MOFT for stronger components protection as a primary function of lubrication, all other parameters are secondary.

Last edited by zeng; 11/11/17 06:24 AM.
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