Is napa gearlube recommanded for MT
03-06-2006, 07:25 PM
#1
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Join Date: Feb 2006
Posts: 41
Is napa gearlube recommanded for MT
i recntly bought 99 se 5 SPD. i was wondering if can use napa gear lube. my plan is to flush the system. i im only gonna use keep it for a month or so. after that i might get redline and fill it up with that. did anybody out there use napa. how does it perform let me know. thank u
03-06-2006, 09:00 PM
#4
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Originally Posted by 97green
its 80-90w . on the can it says gl3, gl4, gl5.
03-06-2006, 09:14 PM
#5
I would recommend going to Autozone and picking up 5 qts. of Pennzoil Synchromesh for about $6-7/qt. I switched out my Redline MT-90 for sychromesh and I am very pleased with the results. Synchromesh is also rated for GL-4 use.
-Nick
-Nick
03-07-2006, 04:55 AM
#8
Originally Posted by 95CustomMaxima
I would recommend going to Autozone and picking up 5 qts. of Pennzoil Synchromesh for about $6-7/qt. I switched out my Redline MT-90 for sychromesh and I am very pleased with the results. Synchromesh is also rated for GL-4 use.
-Nick
-Nick
03-07-2006, 06:52 AM
#9
I had some cheap castrol GL3,GL4,GL5 lube in the transmission to hold me over for a little when I changed my axles out.
I finally bought some Amsoil GL4 and I am extremely happy with it. It is a ton better than that crap. It is silky smooth shifting gears. I highly recommend buying some Amsoil from talkinghorse in the group deal forums.
I finally bought some Amsoil GL4 and I am extremely happy with it. It is a ton better than that crap. It is silky smooth shifting gears. I highly recommend buying some Amsoil from talkinghorse in the group deal forums.
03-07-2006, 09:11 AM
#12
Nissan says to use a 75w-90 GL-4. The gear oil I found on Napa's site is made by Valvoline and meets GL-3 thru GL-5 specs. It's probably fine to use, but if you want to be fussy I would recommend a 'true' GL-4.
Redline MT-90 is a synthetic GL-4 and it's excellent. Amsoil has their AGT gear oil that is a GL-4, but I haven't used it and that product page on their website is dead, so I can't comment on it.
A regular GL-5 (which is often the only option at the local store) can chemically attack the synchros in your tranny. Many gear lubes are rated GL-4 and GL-5 because they get GL-5 performance without being chemically aggressive. So if an oil meets GL-5 and GL-4, it's chemically fine.
But that leaves out one issue: lubricity - GL-5 is 'slicker' than GL-4, so the synchros will not get as much grip on the gears when you use a GL-5. As the synchros wear I would expect this becomes more influential. The result is balky shifting if the synchros can't grip the gears well, and if you're not careful (driver factor) you can wear the synchros, gears, and clutch sleeves very quickly.
Many people have used all kinds of gear oil, GL-4, GL4/GL5, GL-5 and had better/same/worse results. If it works for you, keep using it. But if you want to play the 'safe' road according to Nissan's recommendations, use a regular GL-4.
The GM Synchromesh fluid is a thinner oil than an 80w-90 or 75w-90, so I would avoid that unless you have shifting troubles when it's cold out. Once the transmission has warmed up, the GM fluid will simply be too thin.
Dave
Redline MT-90 is a synthetic GL-4 and it's excellent. Amsoil has their AGT gear oil that is a GL-4, but I haven't used it and that product page on their website is dead, so I can't comment on it.
A regular GL-5 (which is often the only option at the local store) can chemically attack the synchros in your tranny. Many gear lubes are rated GL-4 and GL-5 because they get GL-5 performance without being chemically aggressive. So if an oil meets GL-5 and GL-4, it's chemically fine.
But that leaves out one issue: lubricity - GL-5 is 'slicker' than GL-4, so the synchros will not get as much grip on the gears when you use a GL-5. As the synchros wear I would expect this becomes more influential. The result is balky shifting if the synchros can't grip the gears well, and if you're not careful (driver factor) you can wear the synchros, gears, and clutch sleeves very quickly.
Many people have used all kinds of gear oil, GL-4, GL4/GL5, GL-5 and had better/same/worse results. If it works for you, keep using it. But if you want to play the 'safe' road according to Nissan's recommendations, use a regular GL-4.
The GM Synchromesh fluid is a thinner oil than an 80w-90 or 75w-90, so I would avoid that unless you have shifting troubles when it's cold out. Once the transmission has warmed up, the GM fluid will simply be too thin.
Dave
03-07-2006, 10:09 PM
#15
Originally Posted by 4DRSpeed
I finally bought some Amsoil GL4 and I am extremely happy with it. It is a ton better than that crap. It is silky smooth shifting gears. I highly recommend buying some Amsoil from talkinghorse in the group deal forums.
012345
03-07-2006, 10:52 PM
#16
Originally Posted by dgeesaman
The GM Synchromesh fluid is a thinner oil than an 80w-90 or 75w-90, so I would avoid that unless you have shifting troubles when it's cold out. Once the transmission has warmed up, the GM fluid will simply be too thin.
Dave
If I have a problem with it this summer I will definately report that fact and give an earful to Jon who recommended it's use (my boss and shop owner).
Be aware though GM synchromesh and pennzoil synchromesh does not actually have an API GL rating however, if it does it is not listed anywhere on the bottle.
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