Need recom. for f/r diff (AWD) 2014 Q50S Infinti

[DirtyApe]

Here are the specs needed from the owners manual, what say you, all-knowing oil folks?

Front:
Genuine NISSAN Differential Oil Hypoid Super GL-5 80W-90 or API GL-5, Viscosity SAE
80W-90*4
Rear:
API GL-5 Synthetic gear oil, Viscosity SAE 75W-90*5

*4: For hot climates, viscosity SAE 90 is suitable for ambient temperatures above 328F (08C).
*5: See an INFINITI retailer for service for synthetic oil.

 

[mehullica]

Redline 75w90

 

[DirtyApe]

Originally Posted By: mehullica
Redline 75w90


for the front as well?

 

[simple_gifts]

Amsoil makes a 80W-90 which i am using in my 2300

 

[ExMachina]

Front and rear, the best (likely) is Amsoil Severe Gear 75w-90, both front and rear.

See http://www.amsoil.com/mygarage/vehiclelookup.aspx for a build list.

Also, see the tech comparison at: http://www.lastgreatroadtrip.com/wp-content/uploads/2010/11/gear-oil-comparison.pdf

 

[Garak]

Shell lists Pennzoil Gearplus 80W-90 GL-5 for the front and Pennzoil Synthetic 75W-90 GL-5 for the rear, along with the Shell Spirax equivalents. I'm not exactly sure why there is this minor difference in viscosity between front and rear, but it's been that way for a number of years with Infiniti products.

All the majors will have something suitable, along with Red Line and Amsoil and RP and so forth.

 

[DirtyApe]

Originally Posted By: Garak
Shell lists Pennzoil Gearplus 80W-90 GL-5 for the front and Pennzoil Synthetic 75W-90 GL-5 for the rear, along with the Shell Spirax equivalents. I'm not exactly sure why there is this minor difference in viscosity between front and rear, but it's been that way for a number of years with Infiniti products.

All the majors will have something suitable, along with Red Line and Amsoil and RP and so forth.


I can find the 80-90 gear plus but the 75-90 is showing gl-4 ?, I see valvoline has a full 75-90 and blend 80-90, ok too? thank you!

 

[Garak]

As long as it meets the specification and the viscosity is about correct (i.e. a 75w-90 and an 80w-90 aren't hugely different), I wouldn't worry. The rear differential in my G37 calls for 80w-90, but it's got 75w-90. But, I wouldn't substitute GL-4 when it calls for GL-5.