So... I would like to make a list of oils and retailers that sell GL4 gear oil. You probably already know GL5 gear oil contains additional EP additives that will oxidize and essentially 'eat away' components of the brass baulk rings in many late-model import transmissions. This 'incompatibility with yellow metals' eventually causes hard shifting, grinding and eventually people will need to either rebuild or replace the transmission.
It is a VERY common mistake which has cost owners countless millions of $ and causes uncertainty when buying a used transmission (because miles become a poor indicator of baulk ring wear if GL-5 oil was used)...
The other day I found that getting GL4 is getting to be more and more of a pain unless you order it online. Can anybody contribute to this list of known compatible oils, and retailers who sell them? I would eventually like to make this a full list, so please contribute.
Nissan dealerships - has been reported that they carry GL-4 gear oils.
GM/Pennzoil/other off-brand Synchromesh - Autozone, etc.
Redline MT90/MT85 - Summit racing, local speed shops, others
Redline Shockproof - Summit racing, local speed shops, others
Redline 75W90 - Summit racing, local speed shops, others
Royal Purple - Autozone, Murrays, etc.
Amsoil Gear Lube 75W-90 API GL-4 - Amsoil sales rep, etc.
Also:
It is a VERY common mistake which has cost owners countless millions of $ and causes uncertainty when buying a used transmission (because miles become a poor indicator of baulk ring wear if GL-5 oil was used)...
The other day I found that getting GL4 is getting to be more and more of a pain unless you order it online. Can anybody contribute to this list of known compatible oils, and retailers who sell them? I would eventually like to make this a full list, so please contribute.
Nissan dealerships - has been reported that they carry GL-4 gear oils.
GM/Pennzoil/other off-brand Synchromesh - Autozone, etc.
Redline MT90/MT85 - Summit racing, local speed shops, others
Redline Shockproof - Summit racing, local speed shops, others
Redline 75W90 - Summit racing, local speed shops, others
Royal Purple - Autozone, Murrays, etc.
Amsoil Gear Lube 75W-90 API GL-4 - Amsoil sales rep, etc.
Also:
ZSpeedPerformance wrote:
Nissan MTF
is the best for cold and recommended for most Nissan M/T , Not great for hard driving as it is pretty thin
Redline MT-90
Redline MT-90
good lube but a little thick on cold shifts
Redline MT-85
Redline MT-85
We have used this with good success in the newer RWD 6 Speeds, Can be used in older nissan trans also and will help with cold shifts over the MT-90
Motul Gear 300
Motul Gear 300
, 100% ester based synthetic gear lube, One of our favorites, Good cold viscosity (shifts easy cold) Will not harm Brass (yellow) metals, syncros ect. Very high hot film strength to protect gears under abusive use, Expensive but worth it to save your trans, Esp drag racing wear gear loads are very high.
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