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"Marine" Gear Oil vs. Regular Gear Oil? #4567549
11/08/17 09:14 AM
11/08/17 09:14 AM
Joined: Jul 2012
Posts: 145
Bucks County, PA
Hot_Ajax Offline OP
Hot_Ajax  Offline OP
Joined: Jul 2012
Posts: 145
Bucks County, PA
Is it critical to use gear oil designated as marine gear lube instead of using gear lube that has no such designation? I am indeed puzzled and inquiring minds want to know. Thanks in advance. Hot Ajax

Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Hot_Ajax] #4567556
11/08/17 09:21 AM
11/08/17 09:21 AM
Joined: Feb 2016
Posts: 686
NJ, USA
MotoTribologist Offline
MotoTribologist  Offline
Joined: Feb 2016
Posts: 686
NJ, USA
The main difference between them should be their interaction with moisture/water. A marine gear oil should be designed to handle water contamination quite well with little or no effect on overall performance for at least a short time. A general automotive gear oil will nto likely have those same characteristics.

The general performance will not likely be all that different, but that water handling ability of a marine gear oil can certainly be crucial in the right conditions.

Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Hot_Ajax] #4567589
11/08/17 09:45 AM
11/08/17 09:45 AM
Joined: Mar 2004
Posts: 21,096
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 21,096
Upstate NY
Since they carry marine gear oil at Walmart and typically you use 1 to 2 QTs, it would seem a no brainier.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: MotoTribologist] #4567600
11/08/17 09:56 AM
11/08/17 09:56 AM
Joined: Jul 2012
Posts: 145
Bucks County, PA
Hot_Ajax Offline OP
Hot_Ajax  Offline OP
Joined: Jul 2012
Posts: 145
Bucks County, PA

Last edited by Hot_Ajax; 11/08/17 09:59 AM.
Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: MotoTribologist] #4567605
11/08/17 09:57 AM
11/08/17 09:57 AM
Joined: Jul 2012
Posts: 145
Bucks County, PA
Hot_Ajax Offline OP
Hot_Ajax  Offline OP
Joined: Jul 2012
Posts: 145
Bucks County, PA
Originally Posted By: MotoTribologist
The main difference between them should be their interaction with moisture/water. A marine gear oil should be designed to handle water contamination quite well with little or no effect on overall performance for at least a short time. A general automotive gear oil will nto likely have those same characteristics.

The general performance will not likely be all that different, but that water handling ability of a marine gear oil can certainly be crucial in the right conditions.


Thanks, MotoTribologist. Good explanation. Much appreciated. Exactly the type of explanation I was looking for, not whether I can save 25 Cents at Walmart

Last edited by Hot_Ajax; 11/08/17 10:10 AM.
Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Hot_Ajax] #4567669
11/08/17 10:51 AM
11/08/17 10:51 AM
Joined: May 2012
Posts: 5,660
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,660
Fort Lauderdale, FL
Moto nailed it on the head.


07 Lincoln Navigator M1 0w-40/FU
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Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: DoubleWasp] #4568102
11/08/17 05:20 PM
11/08/17 05:20 PM
Joined: Jul 2012
Posts: 145
Bucks County, PA
Hot_Ajax Offline OP
Hot_Ajax  Offline OP
Joined: Jul 2012
Posts: 145
Bucks County, PA
Moto sure did. Loved his response.

Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: MotoTribologist] #4588873
11/29/17 01:12 PM
11/29/17 01:12 PM
Joined: Jun 2003
Posts: 528
LA (Lower Alabama)
doyall Offline
doyall  Offline
Joined: Jun 2003
Posts: 528
LA (Lower Alabama)
What different constituents would be used in a gear oil designed to handle water contamination?

Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Hot_Ajax] #4588949
11/29/17 02:24 PM
11/29/17 02:24 PM
Joined: Sep 2010
Posts: 7,478
Texas & Global
4WD Online confused
4WD  Online Confused
Joined: Sep 2010
Posts: 7,478
Texas & Global
I have seen “milky” marine gear oil in the past, Pennzoil, Evinrude, etc … but my last drain started with very clean water (maybe 4 Oz) followed by very clean oil. This oil was Merc. Gear Lube+
So did it “resist” invasion or what?


2018 Chevy 1500 Z71 4WD
2017 Chevy Tahoe LT 4WD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ - RS Turbo
Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Hot_Ajax] #4589697
11/30/17 09:46 AM
11/30/17 09:46 AM
Joined: Nov 2017
Posts: 11
Ohio
Skier Offline
Skier  Offline
Joined: Nov 2017
Posts: 11
Ohio
If your lower unit doesn't take in water, the Pennzoil Marine gear lube is fine. It's easier to get in there with that tapered spout.

Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: MotoTribologist] #4591373
12/01/17 06:47 PM
12/01/17 06:47 PM
Joined: Oct 2006
Posts: 1,881
Oshawa, Ont. Canada
irv Offline
irv  Offline
Joined: Oct 2006
Posts: 1,881
Oshawa, Ont. Canada
Originally Posted By: MotoTribologist
The main difference between them should be their interaction with moisture/water. A marine gear oil should be designed to handle water contamination quite well with little or no effect on overall performance for at least a short time. A general automotive gear oil will nto likely have those same characteristics.

The general performance will not likely be all that different, but that water handling ability of a marine gear oil can certainly be crucial in the right conditions.

https://www.amsoil.com/shop/by-product/gear-lube/universal-synthetic-marine-gear-lube/?code=AGMTB-EA
True marine gear performance. Provides superior protection from shock loading. Resists foam and retains extreme-pressure qualities even when subjected to 10% water contamination. For use in outboard lower units, sterndrives, V-drives, bow and tunnel thrusters and marine transmissions Excellent for use in ATVs.[i][/i]


2017 Chevy Impala 3.6 L.
2013 Ram 5.7 L Hemi Bighorn QC 4x4
2008 Chevy Malibu 2.4 L Ecotec
Pennzoil Platinum and/or Pennzoil Ultra Platinum in all 3.
Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Hot_Ajax] #4592087
12/02/17 01:28 PM
12/02/17 01:28 PM
Joined: Feb 2013
Posts: 3,339
Central Virginia
Silverado12 Online content
Silverado12  Online Content
Joined: Feb 2013
Posts: 3,339
Central Virginia
FWIW I used Amsoil gear oil in my lower unit one season and it came out black. I went back to Mercury oil (the blue stuff) and never had another problem.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Silverado12] #4592270
12/02/17 05:25 PM
12/02/17 05:25 PM
Joined: Oct 2006
Posts: 1,881
Oshawa, Ont. Canada
irv Offline
irv  Offline
Joined: Oct 2006
Posts: 1,881
Oshawa, Ont. Canada
Originally Posted By: Silverado12
FWIW I used Amsoil gear oil in my lower unit one season and it came out black. I went back to Mercury oil (the blue stuff) and never had another problem.


What do you think caused the oil to turn black? I have no clue myself, but could it be it was dirty in there due to the Merc oil and the Amsoil just cleaned it up or do you think it was an inferior product?

I have used Amsoil in my old ATV, but that's about as far as it goes today with it's use, other than using their grease for my snowmobiles.


2017 Chevy Impala 3.6 L.
2013 Ram 5.7 L Hemi Bighorn QC 4x4
2008 Chevy Malibu 2.4 L Ecotec
Pennzoil Platinum and/or Pennzoil Ultra Platinum in all 3.
Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: doyall] #4594103
12/04/17 03:00 PM
12/04/17 03:00 PM
Joined: Feb 2016
Posts: 686
NJ, USA
MotoTribologist Offline
MotoTribologist  Offline
Joined: Feb 2016
Posts: 686
NJ, USA
Originally Posted By: doyall
What different constituents would be used in a gear oil designed to handle water contamination?

Emulsifiers for the most part.

Re: "Marine" Gear Oil vs. Regular Gear Oil? [Re: Hot_Ajax] #4611804
12/23/17 05:11 AM
12/23/17 05:11 AM
Joined: Jun 2012
Posts: 1,171
Australia
supercity Offline
supercity  Offline
Joined: Jun 2012
Posts: 1,171
Australia
Most consumer grade products wouldn't be anything special. Stern tube lubes are historically very basic, cost wins. There is a movement towards biodegradable lubes more than water tolerant ones. Water tolerance may sound like a good idea to the enthusiast however it's rarely a feature.

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