Any UOA for manual transmission fluid? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

qqzj · 07-25-2017, 08:16 PM

I am going to put Motul 300 into both my trans and diff. However, I read an article on oils recently:

https://uploads.tapatalk-cdn.com/file...nsaxle_oil.pdf

One of the comments scares me a bit:

When we use a GL-5 product in a transmission that requires GL-4, we normally find 2 to 4 times as much copper in the used oil as we would with a GL-4 product (with used oil analysis). Eventually the synchronizers wear to the point that they no longer make contact with the other half of the cone, bottoming out before stopping the opposing gear.

We know the trans oil in 86 is spec-ed as GL-3, which has less EP than GL-4. So GL-5 oil is going to eat away our transmission even quicker? Since Motul 300 is both GL-4 and GL-5 compatible, I am kind of confused. What does it mean to be both GL 4/5 compatible? How does Motul managed to do that? Is Motul 300 is going to destroy our transmission quicker than OEM? Any advice will be greatly appreciated. Thanks.

PS: Another scary comment:

You need to realize that an oil with GL-4/GL-5 on the label is a GL-5. It is not appropriate for synchronized transmissions.

qqzj · 07-25-2017, 08:18 PM

Pentosin is GL4, but it is 75w80. OEM is 75w90. I am going to pick one from the two. Should I pick Motul or Pentonsin? Thanks.

Teseo · 07-25-2017, 10:39 PM

Motul or gtfo

humfrz · 07-26-2017, 01:43 AM

I figure as long as what your putting into the gear cases follows the specifications in your manual ....... it don't make no difference ......for average driving.

I'm ah feared you're overthinking this oil thing .....

humfrz

bluesubie · 07-26-2017, 07:46 AM

From someone on bobistheoilguy.com that is an oil blender:

Quote:

GL-5; Specified for hypoid gear service but with shock loads and severe service operation. Usually meets Mil-L-2105D and in most cases, is the multipurpose automotive gear oil. Most 75W90 to 75W140 grades meet the GL-5 classification. This grade has a high level of Extreme-Pressure additives that could be mildly corrosive to nonferrous parts, such as brass, bronze and aluminum parts. Most of the modern GL-5 lubes contain metal deactivators that prevents attacks by the extreme-pressure additives. In addition to EP additives, these lubes contain rust inhibitors, defoamants, friction modifiers, thickeners, and Viscosity Index Improvers.

https://bobistheoilguy.com/forums/ub...ion#Post729255

qqzj · 07-26-2017, 10:00 AM

That's why some uoa would be helpful. There is one from BMW. Seems to be okay.

https://www.bobistheoilguy.com/forum...Number=1165727

Sent from my iPhone using Tapatalk

venturaII · 07-26-2017, 01:17 PM

Quote:

Originally Posted by bluesubie

From someone on bobistheoilguy.com that is an oil blender:

https://bobistheoilguy.com/forums/ub...ion#Post729255

Those deactivators work by creating a coating on the soft metals, protection them from the corrosive action of the EP additives. However in the case of synchros, their fundamental mode of function causes the coating to flake and chip off, which also takes a portion of the base substrate with it. Stick with GL4 or lower and it's not an issue.

qqzj · 07-26-2017, 05:20 PM

Well, the spec calls for GL4 75w90 gear oil, here are two that fit the bill exactly. the problem is that both got bad reviews from 86 drivers. I choose pentonsin and motul b/c they got relatively less bad reviews. in fact, i have bought motul already. but i am okay to buy 3 qts other oil since i can use motul next time for diff anyway

Redline MT90,
https://www.redlineoil.com/product.aspx?pid=46

Amsoil MTG
http://www.amsoil.com/shop/by-produc...r-lube-75w-90/

gravitylover · 07-27-2017, 09:29 AM

A while back I asked at a local parts store and the guy pulled out a Pennzoil (I think) GL3 75W90.

mav1178 · 07-31-2017, 08:14 PM

I did it back in 2015.

http://www.ft86club.com/forums/showthread.php?t=88580

qqzj · 08-01-2017, 12:08 AM

Nice. Thanks! Seem Amsoil is pretty good. Have you heard any negative feedback for Amsoil? Thanks.

four-mat · 08-03-2017, 08:59 PM

I got the dimple magnet plugs should I buy 3 more for the fill and drain plug for differential and transmission?

Sent from my LG-H918 using Tapatalk

cueball89 · 08-03-2017, 09:45 PM

I switched from the oem fluid to the Amsoil MTG. Similar feel when cold and shifting in to 2nd gear. Other wise it's nice and smooth and I have no complaints with it.

VR4EVER · 08-04-2017, 02:26 PM

I've got Amsoil in mine. It's ok... I am going to switch to Pentosin though. I think it had redline in it when I bought it (fluid was awfully red when I drained it...) and it shifted better than the Amsoil.

I only changed it because I wasn't sure what it had in it and wanted to be sure it wasn't the stock junk.

07-25-2017, 08:16 PM	#1
qqzj Senior Member Join Date: Sep 2013 Drives: MDX, Camry Location: SF, CA Posts: 399 Thanks: 54 Thanked 69 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Any UOA for manual transmission fluid? I am going to put Motul 300 into both my trans and diff. However, I read an article on oils recently: https://uploads.tapatalk-cdn.com/file...nsaxle_oil.pdf One of the comments scares me a bit: When we use a GL-5 product in a transmission that requires GL-4, we normally find 2 to 4 times as much copper in the used oil as we would with a GL-4 product (with used oil analysis). Eventually the synchronizers wear to the point that they no longer make contact with the other half of the cone, bottoming out before stopping the opposing gear. We know the trans oil in 86 is spec-ed as GL-3, which has less EP than GL-4. So GL-5 oil is going to eat away our transmission even quicker? Since Motul 300 is both GL-4 and GL-5 compatible, I am kind of confused. What does it mean to be both GL 4/5 compatible? How does Motul managed to do that? Is Motul 300 is going to destroy our transmission quicker than OEM? Any advice will be greatly appreciated. Thanks. PS: Another scary comment: You need to realize that an oil with GL-4/GL-5 on the label is a GL-5. It is not appropriate for synchronized transmissions. Last edited by qqzj; 07-25-2017 at 08:27 PM.

07-27-2017, 09:29 AM	#9
gravitylover Senior Member Join Date: Nov 2014 Drives: 2013 BRZ Premium 6MT White Location: SE NY Posts: 1,503 Thanks: 1,218 Thanked 669 Times in 474 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	A while back I asked at a local parts store and the guy pulled out a Pennzoil (I think) GL3 75W90. __________________

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07-25-2017, 08:18 PM	#2
qqzj Senior Member Join Date: Sep 2013 Drives: MDX, Camry Location: SF, CA Posts: 399 Thanks: 54 Thanked 69 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Pentosin is GL4, but it is 75w80. OEM is 75w90. I am going to pick one from the two. Should I pick Motul or Pentonsin? Thanks.

07-25-2017, 10:39 PM	#3
Teseo Senior Member Join Date: Jun 2014 Drives: frs Location: Gunsai Posts: 4,955 Thanks: 7,477 Thanked 2,981 Times in 1,803 Posts Mentioned: 23 Post(s) Tagged: 2 Thread(s)	Motul or gtfo

07-26-2017, 01:43 AM	#4
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,432 Thanks: 29,826 Thanked 32,845 Times in 16,844 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	I figure as long as what your putting into the gear cases follows the specifications in your manual ....... it don't make no difference ......for average driving. I'm ah feared you're overthinking this oil thing ..... humfrz

07-26-2017, 10:00 AM	#6
qqzj Senior Member Join Date: Sep 2013 Drives: MDX, Camry Location: SF, CA Posts: 399 Thanks: 54 Thanked 69 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	That's why some uoa would be helpful. There is one from BMW. Seems to be okay. https://www.bobistheoilguy.com/forum...Number=1165727 Sent from my iPhone using Tapatalk

07-26-2017, 05:20 PM	#8
qqzj Senior Member Join Date: Sep 2013 Drives: MDX, Camry Location: SF, CA Posts: 399 Thanks: 54 Thanked 69 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Well, the spec calls for GL4 75w90 gear oil, here are two that fit the bill exactly. the problem is that both got bad reviews from 86 drivers. I choose pentonsin and motul b/c they got relatively less bad reviews. in fact, i have bought motul already. but i am okay to buy 3 qts other oil since i can use motul next time for diff anyway Redline MT90, https://www.redlineoil.com/product.aspx?pid=46 Amsoil MTG http://www.amsoil.com/shop/by-produc...r-lube-75w-90/

07-31-2017, 08:14 PM	#10
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,099 Times in 3,030 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	I did it back in 2015. http://www.ft86club.com/forums/showthread.php?t=88580

08-01-2017, 12:08 AM	#11
qqzj Senior Member Join Date: Sep 2013 Drives: MDX, Camry Location: SF, CA Posts: 399 Thanks: 54 Thanked 69 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Nice. Thanks! Seem Amsoil is pretty good. Have you heard any negative feedback for Amsoil? Thanks.

08-03-2017, 08:59 PM	#12
four-mat Junior Member Join Date: Oct 2015 Drives: 2014 Subaru BRZ Location: USA Posts: 9 Thanks: 0 Thanked 2 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I got the dimple magnet plugs should I buy 3 more for the fill and drain plug for differential and transmission? Sent from my LG-H918 using Tapatalk

08-03-2017, 09:45 PM	#13
cueball89 Senior Member Join Date: Apr 2016 Drives: 15 Impreza Location: NY Posts: 168 Thanks: 66 Thanked 78 Times in 52 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I switched from the oem fluid to the Amsoil MTG. Similar feel when cold and shifting in to 2nd gear. Other wise it's nice and smooth and I have no complaints with it.

08-04-2017, 02:26 PM	#14
VR4EVER Member Join Date: Jun 2016 Drives: 2013 LS3 FRS, 3000GT VR4, MKV Supra Location: Dayton Ohio Posts: 53 Thanks: 5 Thanked 13 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I've got Amsoil in mine. It's ok... I am going to switch to Pentosin though. I think it had redline in it when I bought it (fluid was awfully red when I drained it...) and it shifted better than the Amsoil. I only changed it because I wasn't sure what it had in it and wanted to be sure it wasn't the stock junk.

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