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75W-110 Gear Oils #4784005
06/11/18 02:24 PM
06/11/18 02:24 PM
Joined: Apr 2017
Posts: 1,603
San Rafael, CA
dogememe Offline OP
dogememe  Offline OP
Joined: Apr 2017
Posts: 1,603
San Rafael, CA
Ford specs 75w-90/80w-90 for civilian Vics and 75w-140 for CVPIs but it's the same diff...

I'm torn between using 75w-90 for improved fuel economy and 75w-140 for better protection during aggressive driving or extended highway trips that may or may not involve higher than suggested operating speeds. Obviously my usage is not as severe as typical police use, but it's also not your average grandma driving.

It looks like there are a few companies making 75W-110, one of them being Amsoil. I've never used Amsoil products before. but I'm thinking this seems like a good middle ground in terms of fuel economy and protection at high temperatures.

Anybody used 75W-110 before, and if it's a good idea, where can I buy this at the best price? The price seems reasonable compared to other quality synthetic gear oils like Royal Purple (which is what was gonna end up in this diff before I came across that Amsoil), etc. I plan to change it every 60K miles.

https://www.amsoil.com/shop/by-product/gear-lube/severe-gear-75w-110/

Last edited by dogememe; 06/11/18 02:27 PM.

2010 Ford Escape 2.5 ~92K Miles: RP 5W-30, AMSOIL SS FE ATF.
1995 Chevy Silverado 5.7 ~277K Miles: Delo 10W-30, AMSOIL OE MV ATF.
AMSOIL in EVERYTHING!
Re: 75W-110 Gear Oils [Re: dogememe] #4784015
06/11/18 02:36 PM
06/11/18 02:36 PM
Joined: Jul 2005
Posts: 31,229
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 31,229
NY
I was thinking the exact same thing this morning. I just did the differentials on both of my Jeeps and plan on doing my 88 E-150 possibly next week. I was thinking of using 75W-90, or 75W-110, which is not easy to find locally. I shot my buddy Trav an email and went with his recommendation of 75W-140 for the Ford.


God Bless Our Troops

Re: 75W-110 Gear Oils [Re: dogememe] #4784042
06/11/18 02:57 PM
06/11/18 02:57 PM
Joined: Jan 2012
Posts: 4,881
Florida
hatt Offline
hatt  Offline
Joined: Jan 2012
Posts: 4,881
Florida
I'd just use 75w-140 if you're worried about it. Amsoil has a pretty good price on it. Get with Pablo.


2013 F150 5.0, PUP 10W-30, Wix 57502
2010 Camry 2.5, GTX 5W-20, Fram Ultra XG9972
Re: 75W-110 Gear Oils [Re: hatt] #4784044
06/11/18 02:59 PM
06/11/18 02:59 PM
Joined: Apr 2017
Posts: 1,603
San Rafael, CA
dogememe Offline OP
dogememe  Offline OP
Joined: Apr 2017
Posts: 1,603
San Rafael, CA
Originally Posted By: hatt
I'd just use 75w-140 if you're worried about it. Amsoil has a pretty good price on it. Get with Pablo.


I wouldn't say worried is the right word. But for the same price as 140, the 110 will give be better fuel economy and I drive quite a bit. I'm sure calming down my driving habits matters more than the viscosity of the gear oil in the rear diff but money saved is always good.

Last edited by dogememe; 06/11/18 03:02 PM.

2010 Ford Escape 2.5 ~92K Miles: RP 5W-30, AMSOIL SS FE ATF.
1995 Chevy Silverado 5.7 ~277K Miles: Delo 10W-30, AMSOIL OE MV ATF.
AMSOIL in EVERYTHING!
Re: 75W-110 Gear Oils [Re: dogememe] #4784048
06/11/18 03:03 PM
06/11/18 03:03 PM
Joined: Jan 2012
Posts: 4,881
Florida
hatt Offline
hatt  Offline
Joined: Jan 2012
Posts: 4,881
Florida
If you're worried about fuel economy use the recommended 75w-90. Pablo is an Amsoil rep here.


2013 F150 5.0, PUP 10W-30, Wix 57502
2010 Camry 2.5, GTX 5W-20, Fram Ultra XG9972
Re: 75W-110 Gear Oils [Re: dogememe] #4784062
06/11/18 03:24 PM
06/11/18 03:24 PM
Joined: Dec 2017
Posts: 1,439
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,439
US
.

Last edited by JLTD; 06/11/18 03:24 PM.

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

Using AMSOIL

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

His: 2015 4Runner 45k, OE 5w30/Wix

Re: 75W-110 Gear Oils [Re: dogememe] #4784068
06/11/18 03:35 PM
06/11/18 03:35 PM
Joined: Mar 2013
Posts: 5,123
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 5,123
The Midwest


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Wanted: 2019 Ford Ranger
Re: 75W-110 Gear Oils [Re: dogememe] #4784085
06/11/18 03:55 PM
06/11/18 03:55 PM
Joined: Sep 2010
Posts: 7,595
Planet Earth
2015_PSD Offline
2015_PSD  Offline
Joined: Sep 2010
Posts: 7,595
Planet Earth
75W-110 is the upper viscosity that 75W-90 used to be before the J306 tables were updated. I have used Amsoil 75W-110 in the front axles of my 2010 FX4 and my 2015 F250 with no issues.

Re: 75W-110 Gear Oils [Re: skyactiv] #4784091
06/11/18 04:04 PM
06/11/18 04:04 PM
Joined: Apr 2017
Posts: 1,603
San Rafael, CA
dogememe Offline OP
dogememe  Offline OP
Joined: Apr 2017
Posts: 1,603
San Rafael, CA
Originally Posted By: 2015_PSD
75W-110 is the upper viscosity that 75W-90 used to be before the J306 tables were updated. I have used Amsoil 75W-110 in the front axles of my 2010 FX4 and my 2015 F250 with no issues.


Very intersting information, thank you. Looks like I will be purchasing 75W-110 when I change the diff oil!

Originally Posted By: skyactiv


Any reason in particular? Is this better than the Amsoil product?


2010 Ford Escape 2.5 ~92K Miles: RP 5W-30, AMSOIL SS FE ATF.
1995 Chevy Silverado 5.7 ~277K Miles: Delo 10W-30, AMSOIL OE MV ATF.
AMSOIL in EVERYTHING!
Re: 75W-110 Gear Oils [Re: dogememe] #4784100
06/11/18 04:12 PM
06/11/18 04:12 PM
Joined: Jan 2009
Posts: 1,342
Watertown, New York
cronk Offline
cronk  Offline
Joined: Jan 2009
Posts: 1,342
Watertown, New York
I was in a similar situation.
My 1998 GMC C1500 called for 80w90 in the rear diff. I was planning on doing quite a bit of towing with it, had a couple trips towing my camper.
I ended up using the 75w110 Amsoil Severe Gear and my truck towed the camper from NY to Illinois, to the Adirondack mountains in NY, and another trip across NY.
The 75w110 was just the thing, and you would be hard pressed to find a gear lube better than Severe Gear!


2008 Ford F350
2003 Chevy Cavalier
2011 Nissan Quest
1986 Pontiac Trans Am
1940 Ford 9N Tractor
Amsoil lubes and filters!
Re: 75W-110 Gear Oils [Re: dogememe] #4784134
06/11/18 04:56 PM
06/11/18 04:56 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
I used Lucas 75-140 with Ford friction modifier when I had my 98 F150. 3.55 LSD


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: 75W-110 Gear Oils [Re: dogememe] #4784142
06/11/18 05:07 PM
06/11/18 05:07 PM
Joined: Sep 2003
Posts: 1,341
Austin, TX
MaximaGuy Offline
MaximaGuy  Offline
Joined: Sep 2003
Posts: 1,341
Austin, TX
Used the Amsoil 75W110 the year it was introduced and never looked back and it has served my x-case and differential quite well.
Presently on RL 75W110 on both units, personally prefer Amsoil, when it came out after 100K on it, it was slightly dark - could have gone further (don't tow on my vehicle)


2018 MB GLE350
2011 Lexus ES350
2006 Toyota Highlander 4WD
Re: 75W-110 Gear Oils [Re: dogememe] #4784190
06/11/18 05:45 PM
06/11/18 05:45 PM
Joined: Dec 2006
Posts: 19,235
Dallas,Tx USA
aquariuscsm Online content
aquariuscsm  Online Content
Joined: Dec 2006
Posts: 19,235
Dallas,Tx USA
I use Amsoil Sever Gear 75W110 in my 300ZX's rear diff that specs 80W90.


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
Pennzoil Platinum 5W20

Re: 75W-110 Gear Oils [Re: dogememe] #4784232
06/11/18 06:24 PM
06/11/18 06:24 PM
Joined: Dec 2017
Posts: 501
Indy
69Torino Offline
69Torino  Offline
Joined: Dec 2017
Posts: 501
Indy
You wont see a fuel economy difference between any of those weights. Go with 75-140. I have a Mercury Marauder, and Ford back specd my car to 75-140 from 80-90 for a reason, in a TSB. The reason was axle shaft heat treating, but when I put axles in it I went ahead and filled it back up with Valvoline Synpower 75-140. The extra protection is worth the extra $1 a quart. I changed and the car still gets 20mpg if I drive like a sane person. Also running 5w-30 in the engine... if you ask your government I should be getting atrocious fuel mileage.


1969 Ford Torino GT 390 Auto
2003 Mercury Marauder
1992 Mercury Capri Convertible
2005 Ford Freestyle
2008 Hyundai Santa Fe
2015 Kia Optima
1947 Ford 2N
1978 Honda XL75
Plus Other Stuff...
Re: 75W-110 Gear Oils [Re: dogememe] #4784275
06/11/18 07:10 PM
06/11/18 07:10 PM
Joined: Oct 2010
Posts: 7,137
Michigan
A_Harman Offline
A_Harman  Offline
Joined: Oct 2010
Posts: 7,137
Michigan
I just ran 260k miles on the Dana 80 in my Dodge, about 130k of that towing, and the axle now needs a rebuild. 75W-90 the whole time. Would it have lasted longer on 110 or 140? Or should I be happy with 260k miles?


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
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