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#2472629 - 12/25/11 03:27 PM Is this NAPA gear oil GL-4?
Towncivilian Offline


Registered: 01/07/11
Posts: 918
Loc: Florida, USA
Does anybody know if this NAPA 80W-90 gear oil is GL-4 rated?

http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=NO_75210_0006411584

It's made by Valvoline (Ashland) from looking at the MSDS, but other than that I can't find much information about it.
_________________________
2001.5 Pathfinder SE 3.5L A/T 2WD - ML NG 5W-30/PL14610
2007 Altima S - PU 5W-30/M1-110
2009 G5 - PU 5W-30/XG9018
2012 G37 S - ST 5W-30/PL14612

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#2472632 - 12/25/11 03:36 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
Lead Shoes Offline


Registered: 03/03/10
Posts: 2433
Loc: Mn
I believe it is GL-5, it has been a while since I browsed Napa shelves though...
_________________________
1992 BMW 325i 176k
Castrol 0w40/Mahle


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#2472633 - 12/25/11 03:36 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 13604
Loc: South Texas,USA
It's GL5. Only GL4 from NAPA I know of is the Sta Lube GL4 85W90 and the Sta Lube GL4 SAE140.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

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#2472649 - 12/25/11 04:26 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
Towncivilian Offline


Registered: 01/07/11
Posts: 918
Loc: Florida, USA
Thanks for the quick replies guys. Have a merry Christmas!
_________________________
2001.5 Pathfinder SE 3.5L A/T 2WD - ML NG 5W-30/PL14610
2007 Altima S - PU 5W-30/M1-110
2009 G5 - PU 5W-30/XG9018
2012 G37 S - ST 5W-30/PL14612

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#2472655 - 12/25/11 04:40 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
Ken2 Offline


Registered: 12/02/02
Posts: 6358
Loc: Washington St.
Keep in mind that GL-4 is an obsolete spec, and that modern additives used to make a GL-5 gear oil are not harmful to the yellow metals in transmissions. If the label says the oil is OK in transmissions, it probably is OK.
_________________________
Every gun that is made, every warship launched..a theft from those who hunger and are not fed, those who are cold and not clothed.
Gen. Eisenhower


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#2472660 - 12/25/11 04:46 PM Re: Is this NAPA gear oil GL-4? [Re: Ken2]
Al Online   content


Registered: 06/08/02
Posts: 16212
Loc: Elizabethtown, Pa
Originally Posted By: Ken2
Keep in mind that GL-4 is an obsolete spec, and that modern additives used to make a GL-5 gear oil are not harmful to the yellow metals in transmissions. If the label says the oil is OK in transmissions, it probably is OK.


Yea and I can't say to use GL-5 it, but 5 to 10 years ago this subject was beaten to death here with one person known to know what was going on..stated that tests to certify GL-4 were not being done anymore and agreed with ken.

But if you look here:
http://corvaircenter.com/phorum/read.php?1,266128

It claims that that the GL-4 has half of the sulfur/phosphorous additive. This additive provides a stronger EP bond and it tends to bond to bras so strongly that it is ripped away (synchronizers) and caries brass away with it. It claims that much higher levels of brass are seen in Trannies that require GL-4 and use GL-5.

Probably prudence says to go with GL-4 if it is specified.


Edited by Al (12/25/11 05:00 PM)
_________________________

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#2472661 - 12/25/11 04:49 PM Re: Is this NAPA gear oil GL-4? [Re: Ken2]
Towncivilian Offline


Registered: 01/07/11
Posts: 918
Loc: Florida, USA
Originally Posted By: Ken2
Keep in mind that GL-4 is an obsolete spec, and that modern additives used to make a GL-5 gear oil are not harmful to the yellow metals in transmissions. If the label says the oil is OK in transmissions, it probably is OK.

Well, that makes things confusing again. I posted this question in regard to its potential use in a Nissan FS5R30A 5spd transmission in a '94 Hardbody. The FSM specifies GL-4, and there have been horror stories of gold flaked fluid draining out when GL-5 is used in this transmission. I would rather err on the side of caution and use a GL-4 fluid such as Redline MT-90 or Amsoil MTG.
_________________________
2001.5 Pathfinder SE 3.5L A/T 2WD - ML NG 5W-30/PL14610
2007 Altima S - PU 5W-30/M1-110
2009 G5 - PU 5W-30/XG9018
2012 G37 S - ST 5W-30/PL14612

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#2472671 - 12/25/11 04:59 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
bmwtechguy Offline


Registered: 06/15/04
Posts: 2553
Loc: South Carolina
For as little gear oil as is needed to change it out and not very often, I would also go for the real juice mentioned above and stay away from GL5 in a manual gearbox unless just temporarily or quick flush, or all that is available.

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#2472675 - 12/25/11 05:03 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
NHGUY Offline


Registered: 10/09/11
Posts: 4631
Loc: USA
GL5 was always frowned upon due to the "upgrades" made to it that elevated it over GL4.Synchros couldnt take the additives over the long haul.I dont know if any changes have been made to "tame" GL5,but I would frankly stick with something like Redline manual trans fluid thats rated proper.

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#2473319 - 12/26/11 04:29 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 13604
Loc: South Texas,USA
GL5 will give your tranny very poor shifting quality. You`ll grind/crunch gears.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

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#2477911 - 12/30/11 09:50 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
Bror Jace Offline


Registered: 05/27/02
Posts: 5056
Loc: Saratoga, NY
Gear oils with GL4 on the label aren't THAT hard to find ... Chevron 80W-90 is one. I believe Lubro-Moly 75W-90 is another and that brand is available in NAPA stores around here. Coastal used to put GL4 on their label (along with MT-1 and other certifications).

Of course, you can always go mail order with Amsoil and Red Line Oil gear oils, though they are a bit pricey ... but you don't need too much and don't have to do this very often.

Safest bet is to take your time and source a GL4.
_________________________
--- Bror Jace
2015 Mazda 3 iSport
2005 Honda S2000

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#2477990 - 12/31/11 12:04 AM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
Lead Shoes Offline


Registered: 03/03/10
Posts: 2433
Loc: Mn
I was at Napa yesterday, I looked at the one they had on the shelf, it said GL-3 GL-4 GL-5 on the back for certifications, seems to be a one lube fits all type, I would pass if your transmission/diff specifically wants GL-4.


Edited by Brenden (12/31/11 12:04 AM)
_________________________
1992 BMW 325i 176k
Castrol 0w40/Mahle


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#2478226 - 12/31/11 10:45 AM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
Bror Jace Offline


Registered: 05/27/02
Posts: 5056
Loc: Saratoga, NY
If it says GL4 on the back, go with it (regardless of other certifications).
_________________________
--- Bror Jace
2015 Mazda 3 iSport
2005 Honda S2000

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#2479206 - 01/01/12 12:17 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 13604
Loc: South Texas,USA
Just get either Amsoil MTG or Redline MT90. If you use a generic "gear oil" the shifting quality will be horrible. You want the manual tranny-specific add pack,not the rear diferential add pack. When my friend did a twin turbo motor swap in his Z32,he got everything bolted back up and realized he`d forgotten to fill the tranny,and just filled it with a generic GL5 80W90. Shifter was super hard to move and it would grind every gear.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

Top
#2480705 - 01/02/12 08:23 PM Re: Is this NAPA gear oil GL-4? [Re: Towncivilian]
Vikas Offline


Registered: 07/22/05
Posts: 10375
Loc: NorthEast
When the mechanic replaced the axle on 2000 Maxima manual transmission, we lost at least a pint or more of GL-4. The mechanic asks me, "wow that is very clean fluid, when did you last change it?" My answer, "Never; that is factory fill!" The car has 172K miles.

Is there a place where I can relinquish my BITOG card? :-)

- Vikas


Edited by Vikas (01/02/12 08:24 PM)

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