Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Nissan 370Z General Discussions (http://www.the370z.com/nissan-370z-general-discussions/)
-   -   Differential 80w90 vs 75w90 (http://www.the370z.com/nissan-370z-general-discussions/69031-differential-80w90-vs-75w90.html)

darli328 03-29-2013 03:44 PM
Quote:
Originally Posted by SouthArk370Z (Post 2240559)
As long as it meets specs (any high-quality diff lube will), it won't void the warranty. If the dealer gives you any static about it, go to another dealer.

Same with all other lubes/fluids/tires/&c - if it meets Nissan's specs (for lubes, this is usually an API or other standards organization rating), they can't void the warranty.
When you say meets specs are you talking about API 5 or are you talking about weights? Because 75w90 according to my owner's manual doesn't meet the correct oils weight specs.

SouthArk370Z 03-29-2013 04:13 PM
Quote:
Originally Posted by darli328 (Post 2240736)
When you say meets specs are you talking about API 5 or are you talking about weights? Because 75w90 according to my owner's manual doesn't meet the correct oils weight specs.
The API rating is the more important part. The difference in viscosity between 80W90 and 75W90 is insignificant even at low temperatures.

If you're that paranoid about it, go with 80W90, but I can't imagine using 75W90 ever being an issue with a warranty claim (assuming it meets/exceeds all other specs).

darli328 03-29-2013 04:43 PM
Quote:
Originally Posted by SouthArk370Z (Post 2240775)
The API rating is the more important part. The difference in viscosity between 80W90 and 75W90 is insignificant even at low temperatures.

If you're that paranoid about it, go with 80W90, but I can't imagine using 75W90 ever being an issue with a warranty claim (assuming it meets/exceeds all other specs).
Truth be told I already ordered some redline 75w90 when posting this thread based on reviews from people on here. But, I wanted to posts this and see what people thought because I just noticed it myself. Funny thing is my owern's manual says you can use 75w90 in the differential for automatic transmission models (I have a manual transmission) but is the differential for the automatic and manual the exact same thing/part?


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