Recent Topics
Dry Gas in exteme cold weather
by FA_WRX - 01/17/20 06:57 AM
ATF VS ATL
by jrommelt - 01/16/20 11:24 PM
inline oiler for water separator on compressor
by motor_oil_madman - 01/16/20 10:55 PM
5w30 Throw Off VVT [ 5w20 Vehicle ] ?
by Fallguy - 01/16/20 10:54 PM
Ravenol MTF-2
by E365 - 01/16/20 10:36 PM
Road Rage, Then vs Now
by gathermewool - 01/16/20 09:39 PM
Interesting Taillight Out Code
by Gebo - 01/16/20 09:39 PM
Well its here again
by JohnnyJohnson - 01/16/20 06:56 PM
My cheap old stock oil score!
by CleverUserName - 01/16/20 06:52 PM
Trans runs better in severe cold...
by 2009Caraman - 01/16/20 06:41 PM
LSx rocker bolt sealant
by P10crew - 01/16/20 06:00 PM
Nissan Titan any good?
by dfarr67 - 01/16/20 05:24 PM
Cockford-Ollie
by 1978elcamino - 01/16/20 05:23 PM
ATI balancer keyway sealing
by P10crew - 01/16/20 04:53 PM
Silkolene (FUCHS) 10w-60 On Amazon
by BBDartCA - 01/16/20 04:19 PM
To use or not to use
by JHogan - 01/16/20 04:13 PM
The Motul Oil Line...
by Navi - 01/16/20 03:38 PM
Help identifying this drill bit
by henni - 01/16/20 03:13 PM
P38 Lightning
by Kamele0N - 01/16/20 03:01 PM
Why does oil in the spark plug hole cause misfires?
by berniedd - 01/16/20 02:27 PM
Newest Members
MrGoodwrench, Schwifty, Karoofrans, Marksvc1, Anthony_Butcher
70452 Registered Users
Who's Online Now
67 registered members (AndyB, 4WD, 2015_PSD, adams355, alchargo, alarmguy, 5 invisible), 1,564 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics300,215
Posts5,171,082
Members70,452
Most Online3,728
Jan 11th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 2 1 2
75w90 conventional vs syn??? #5289920 12/09/19 10:21 PM
Joined: May 2014
Posts: 731
D
Doublehaul Offline OP
OP Offline
D
Joined: May 2014
Posts: 731
Toyota’s call for 75w85 gl5 front and rear which is not common. 75w90 is though. I understand that interchanging those is fine but my question is in regards to paying extra for 75w90 syn over conventional. Is there any advantage? Does syn gear dope actually last longer and or protect better?

I had strong opinions in the past but some Tacoma enthusiasts are trying to convince me otherwise

Also T case calls for 75w...can I just run the gear dope?


Last edited by Doublehaul; 12/09/19 10:28 PM.

2019 Toyota 4Runner 4x4 TRD
2019 Toyota Tacoma 4x4 TRD*

Mobil 1 0w40


The specs on the back are more important than the label on the front
Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5289924 12/09/19 10:27 PM
Joined: Nov 2004
Posts: 2,078
Z
zrxkawboy Offline
Offline
Z
Joined: Nov 2004
Posts: 2,078
I would definitely run syn in the "ice box of the nation".


"Think of all the Ford owners who will someday want an automobile." John Dodge

Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5289933 12/09/19 11:01 PM
Joined: May 2014
Posts: 731
D
Doublehaul Offline OP
OP Offline
D
Joined: May 2014
Posts: 731
Anyone think I’d be better with 75w140?

Last edited by Doublehaul; 12/09/19 11:01 PM.

2019 Toyota 4Runner 4x4 TRD
2019 Toyota Tacoma 4x4 TRD*

Mobil 1 0w40


The specs on the back are more important than the label on the front
Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5289961 12/10/19 12:07 AM
Joined: Dec 2017
Posts: 5,579
S
Snagglefoot Online Content
Online Content
S
Joined: Dec 2017
Posts: 5,579
How cold does it get it in the icebox?


If you want the job done right......do it yourself.
Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5289968 12/10/19 12:20 AM
Joined: Jul 2005
Posts: 12,896
dave1251 Offline
Offline
Joined: Jul 2005
Posts: 12,896
Originally Posted by Doublehaul
Anyone think I’d be better with 75w140?



Only if you tow over 50% of the time.


make the inside of your engine oil cap white.
don't use.
Re: 75w90 conventional vs syn??? [Re: dave1251] #5289976 12/10/19 12:48 AM
Joined: Sep 2014
Posts: 1,910
O
Oro_O Offline
Offline
O
Joined: Sep 2014
Posts: 1,910
Originally Posted by dave1251
Originally Posted by Doublehaul
Anyone think I’d be better with 75w140?



Only if you tow over 50% of the time.


Yep, don't go there unless really heating it often. Otherwise you just chew up the VIIs, need to change the oil more often and creat more potential problems.

75w90 Syn is worth it IMO, I've run it (vs dino) enough miles/years in Land Cruisers and my Acura SLX (Trooper) to see more longevity. I run 80w/90 as my climate is mild.

Do you have an LSD? Because while that doesn't change viscosity choice, it changes additive requirements and potential base unit brand/type selection.

Plus this stuff is awesome (Lubegard gear oil supplement):

https://www.amazon.com/gp/product/B004BSMI8E/ref=ox_sc_saved_title_3?smid=A3B850ZGIPDG3A&psc=1

Only takes 1oz/qt to make a difference, put it in diffs, MTs, etc. Works.

Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5289987 12/10/19 02:34 AM
Joined: Sep 2017
Posts: 331
B
BlakeB Offline
Offline
B
Joined: Sep 2017
Posts: 331
The following is what I did recently on my brothers 2010 Tacoma calling for 75w85. I plan to run the 80w90 in the front diff until the next oil change and dump it for some 75w90 if it looks ok.
I’m going to be doing the front and rear diffs on my moms 2016 4Runner soon with Starfire 75w90(made by Warren Distribution, I suspect it’s the same as Walmart Supertech and Mag1 75w90). For the transfer case, I may try the Ravenol equivalent to the Toyota fluid.

Ravenol MTF-3

https://www.bobistheoilguy.com/foru...ota-transfer-gear-oil-lf-75w#Post5118386


Originally Posted by BlakeB
2010 Tacoma DCSB (1gr-fe), 42,909 miles

Rear Differential:
Out: factory fill 75w85
In: Starfire full synthetic 75w90

Front Differential:
Out: Factory Fill 75w85
In: Starfire 80w90

The factory fill in the front diff was in really bad shape so I refilled it with some cheap 80w90, I will change it out again with synthetic 75w90 at the next oil change.

Transfer Case:
Out: Factory fill 75w90
In: Amsoil 75w90 (GL-4)

The rear differential and transfer case fluids were in great shape (looked almost new with a minimal amount of fuzz on the rear diff magnet, it did have an odd sliver of metal stuck to it but being the factory fill with close to 10 years of use on it I’m not too worried about it.

Re: 75w90 conventional vs syn??? [Re: BlakeB] #5289996 12/10/19 03:33 AM
Joined: Jul 2005
Posts: 12,896
dave1251 Offline
Offline
Joined: Jul 2005
Posts: 12,896
Changing gear oil should be once in a vehicle lifetime thing unless it becomes containmenated.


make the inside of your engine oil cap white.
don't use.
Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5290049 12/10/19 06:30 AM
Joined: Oct 2010
Posts: 10,277
Astro14 Offline
Offline
Joined: Oct 2010
Posts: 10,277
The Toyota transfer case specification is new. The transfer case is made by Borg-Warner and I don’t know why the specification changed, however, it’s not 75W90, it’s just 75.

I’m running a Ravenol 75W. Bought on Amazon for $17/Qt. Toyota wants about $70/qt for their proprietary 75W.

A few discussions:

https://www.bobistheoilguy.com/foru...19/toyota-lv-75w-substitutes#Post4939219

https://www.bobistheoilguy.com/foru...84599/all/Generation_5_Runner_transfer_c


Last edited by Astro14; 12/10/19 06:30 AM.

32 Packard 15W40
01 Volvo V70 T5 0W30 AMSOIL SS
02 Volvo V70 T5 0W30 Edge
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5290064 12/10/19 06:48 AM
Joined: Dec 2006
Posts: 20,870
A
aquariuscsm Offline
Offline
A
Joined: Dec 2006
Posts: 20,870
Stick with the oem weight.


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 0W20

Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5290098 12/10/19 07:25 AM
Joined: May 2018
Posts: 1,416
K
ka9mnx Offline
Offline
K
Joined: May 2018
Posts: 1,416
Originally Posted by Doublehaul
Anyone think I’d be better with 75w140?

I went from M1 75w-90 in the 4Runner to ST syn 75w-140. Made the 4Runner's axle slightly quieter and the 2 Ford's significantly quieter with no loss in MPG. If you do go to 75w-140 use nothing but synthetic and it does no harm.


2005 Ranger 3.0 - SuperTech Syn 5w-30/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5290134 12/10/19 07:45 AM
Joined: Jan 2017
Posts: 669
J
JLawrence08648 Offline
Offline
J
Joined: Jan 2017
Posts: 669
Only synthetic gear oil. Put regular and synthetic gear oil outside in freezing temps then the next day, pour in to a cup. See which pours easier. Better gas mileage, better lubrication in cold temps.

Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5290138 12/10/19 07:51 AM
Joined: Aug 2010
Posts: 7,103
K
Kira Offline
Offline
K
Joined: Aug 2010
Posts: 7,103
dave1251 above said, "Changing gear oil should be once in a vehicle lifetime thing unless it becomes containmenated."

I bought a low mileage 2005 Ford Ranger FX4 Off-Road recently as many here know.

15 years of service is why I'm changing mine. The OO had 6 boys so who knows.

If the FF is newish looking etc., the joke will be on me.

It's getting synthetic because almost everyone here says it's slightly better.

Many have said there'll be no difference. I wont know either way, will I?

Any comments on my 15 year yardstick are welcome. No highjacking of thread intended.

Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5290441 12/10/19 01:18 PM
Joined: Apr 2011
Posts: 97
1
1000MPH Offline
Offline
1
Joined: Apr 2011
Posts: 97
Many FJ owners and this 4R owner are running Mobil Delvac 75W-90 with no issues in T-case and diffs. No LSD friction modifiers.
Pretty good price at Summit Racing if you've got one near you.

Last edited by 1000MPH; 12/10/19 01:24 PM.

2010 4Runner 106k mi M1 EP High Mileage 0W-20 OEM filter cartridge. Delvac synthetic gear 75W-90.
2015 Rav4 47k mi M1 EP 0W-20 OEM filter cartridge. Delvac synthetic gear 75W-90.
Re: 75w90 conventional vs syn??? [Re: Doublehaul] #5290449 12/10/19 01:24 PM
Joined: Aug 2010
Posts: 2,094
B
benjy Offline
Offline
B
Joined: Aug 2010
Posts: 2,094
i put 75-90 redline real syn in my dana-nissan rear diff. nissan uses their costly buy cheap 75-140 semi syn, but a search on the dana site recommended real synthetic 75-90, if i hauled or towed a lot 75-110 lube

Page 1 of 2 1 2
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™