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Everyone was ok using GL5 in manual trans in usa #4541985
10/13/17 09:17 AM
10/13/17 09:17 AM
Joined: Sep 2015
Posts: 2,256
Malaysia
zeng Offline OP
zeng  Offline OP
Joined: Sep 2015
Posts: 2,256
Malaysia
... GL5 was good in manual transmissions for the past 20 to 30 years , true ??




..and there is a resurgence of GL4 in the past 3 years ...... attributable to marketing ?
GL4 and GL5 oils in manual transmissions
..at 13.25


So, wondering why the fuss on Bitog ?


Source:GearBoxVideo

Last edited by zeng; 10/13/17 09:23 AM.
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4541998
10/13/17 09:37 AM
10/13/17 09:37 AM
Joined: Apr 2005
Posts: 539
NE Ohio
knerml Offline
knerml  Offline
Joined: Apr 2005
Posts: 539
NE Ohio
Your car manufacturer specifies what oil to use.

Over the last 25 years, all of my cars (VW/Audi/Hyundai/Kia) used GL4.

This is not a USA thing.


2015 Hyundai Elantra Sport 2.0 GDI Mobil 1 5W20 & OEM/Mann W811/80 Filter
2018 Hyundai Santa Fe Sport 2.0T Castrol Edge 5W40 & OEM/Mann W811/80 Filter
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542010
10/13/17 09:49 AM
10/13/17 09:49 AM
Joined: Mar 2013
Posts: 4,755
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,755
The Midwest
It surprises me if there are actually more GL4 oil choices to day than there was 10 years ago. The percentage of passenger vehicles on the road with a manual transmission is declining every year.
I have used a GL5 MT-1 oil in a transmission once. It was too slippery and didn't allow fast gear changes without crunching the gears. I quickly swapped to a GL-4 oil , Sta-Lube 85W90 from Napa and everything was fine again.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542016
10/13/17 09:52 AM
10/13/17 09:52 AM
Joined: Sep 2008
Posts: 9,188
Ontario, Canada
IndyIan Offline
IndyIan  Offline
Joined: Sep 2008
Posts: 9,188
Ontario, Canada
No GL-5 gear oil ever got into my manual transmissions. And they all have to gone to the scrap yard working fine. I'll keep on using GL-4 or what the manufacturer recommends.


07 Focus ZXW, 5spd manual, 210km M1 5W30
18 Outback 2.5 CVT 10km 0W20 "bulk subaru" whatever that is
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542044
10/13/17 10:28 AM
10/13/17 10:28 AM
Joined: Sep 2014
Posts: 1,403
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,403
Seattle-ish, WA
I have counted a number of GL-4 lubes from major refiners that have left the market in the last 10 years. What are the new/“resurgence” ones? On his website, I am thinking it is referring to limited boutique oils like from Brad Penn, etc. Which is a poor substitute for the fact used to be able to go into an auto parts store and get them. They seem to be vastly less available now than a few years ago.

Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542048
10/13/17 10:41 AM
10/13/17 10:41 AM
Joined: Nov 2008
Posts: 869
Oklahoma
CELICA_XX Offline
CELICA_XX  Offline
Joined: Nov 2008
Posts: 869
Oklahoma
My old Toyota Supra allowed for either 4 or 5

I always used Mobil 75w-90 GL-5 because that's what was available at AutoZone back in the 90's



Now I use Amsoil MTG GL-4 for most manuals


15 Toyota Prius - M1 EP 0w20
02 Toyota ECHO - Valv MaxLife Full Syn 5w30
97 Lexus LX450 - M1 0w40
93 Lexus LS400 - Valv MaxLife Full Syn 5w30
Re: Everyone was ok using GL5 in manual trans in usa [Re: Oro_O] #4542077
10/13/17 11:14 AM
10/13/17 11:14 AM
Joined: Oct 2014
Posts: 1,217
NoVA
Jimzz Offline
Jimzz  Offline
Joined: Oct 2014
Posts: 1,217
NoVA
Originally Posted By: Oro_O
I have counted a number of GL-4 lubes from major refiners that have left the market in the last 10 years. What are the new/“resurgence” ones? On his website, I am thinking it is referring to limited boutique oils like from Brad Penn, etc. Which is a poor substitute for the fact used to be able to go into an auto parts store and get them. They seem to be vastly less available now than a few years ago.



Yea its much harder to find GL-4 now then back when I was a tech, 20+ years ago. And when you are able to find it the price is higher as its a smaller bottler usually. Even amazon stopped carrying the valvoline 75W90 Gl4 I bought before.


yup
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542085
10/13/17 11:25 AM
10/13/17 11:25 AM
Joined: May 2009
Posts: 12,180
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,180
N.H, U.S.A.
what do you do in a Subaru with a hypoid combined Xaxle?


2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542128
10/13/17 12:42 PM
10/13/17 12:42 PM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
For the past 20 yrs numerous manual transmissions have been using factory specced ATF, never mind GL4 or GL5 fluids....such as GM T56's. Try using GL5 MTL's in almost any factory installed Tremec and I think a lot of them will fail or be much harder to shift. If this guy has done thousands of transmissions on GL5 only without a single failure, he probably hasn't done many Tremecs or those specifying 7 cSt ATF's. I can believe that in old Muncies, Saginaws, Chrysler 833's, etc. that GL5 probably is fine. You don't see many trans rebuilders recommending GL5 in ATF specced transmissions....usually they say just the opposite...don't ever use GL5.


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

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: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542150
10/13/17 01:05 PM
10/13/17 01:05 PM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
Maybe this guy hasn't seen GL5 fluids "corrode" synchronizer rings. But the wrong fluid can cause poor synchronization and increase synchro friction ring wear rates. Either way, it leads to shortened synchro life. Some ATF specced manual transmissions can't even take a GL4/GL5 fluid for a single day without constant grinding. I would submit if those were left in the vehicle for weeks and months, a very premature failure would occur.


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

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: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542156
10/13/17 01:15 PM
10/13/17 01:15 PM
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
Originally Posted By: zeng



..So, wondering why the fuss on Bitog ?...




What fuss?

There has been a lot of misunderstanding with respect to GL-X protection ratings, the chemistry of MTF dedicated fluids, and Old verses New Technology of these fluids.

When GL-5 rated lubes were the only choice available, then that's what you had to use.

But then we learned about the effects of high treatment level of S-P chemistry on internals, and then GM led the industry in introducing MT dedicated fluids formulated by Texaco.

Last edited by MolaKule; 10/13/17 01:20 PM.

Reading is fundamental; understanding is not a given ability.
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542187
10/13/17 01:40 PM
10/13/17 01:40 PM
Joined: Aug 2010
Posts: 1,008
pa
benjy Offline
benjy  Offline
Joined: Aug 2010
Posts: 1,008
pa
i have found Redline MT-90 to be excellent even in the touchy VAG manuals. my jetta was barely shifting using a new at the time Amsoil lube that was later discontinued, prolly about 2005 but a switch to MT-90 cured it, expensive but worth it IMO!!!

Last edited by benjy; 10/13/17 01:41 PM.
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542207
10/13/17 01:56 PM
10/13/17 01:56 PM
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,229
Iowegia - USA
See the Updated White Paper on Manual Transmissions and Lubricants:

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4542195#Post4542195


Reading is fundamental; understanding is not a given ability.
Re: Everyone was ok using GL5 in manual trans in usa [Re: 69GTX] #4542255
10/13/17 02:57 PM
10/13/17 02:57 PM
Joined: Oct 2014
Posts: 11,816
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 11,816
Idaho
Originally Posted By: 69GTX
For the past 20 yrs numerous manual transmissions have been using factory specced ATF, never mind GL4 or GL5 fluids....such as GM T56's. Try using GL5 MTL's in almost any factory installed Tremec and I think a lot of them will fail or be much harder to shift. If this guy has done thousands of transmissions on GL5 only without a single failure, he probably hasn't done many Tremecs or those specifying 7 cSt ATF's. I can believe that in old Muncies, Saginaws, Chrysler 833's, etc. that GL5 probably is fine. You don't see many trans rebuilders recommending GL5 in ATF specced transmissions....usually they say just the opposite...don't ever use GL5.
MUNCIES?


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: Everyone was ok using GL5 in manual trans in usa [Re: zeng] #4542312
10/13/17 03:50 PM
10/13/17 03:50 PM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut


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

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
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