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DIY: Rear Differential Oil Change

For AT and NISMO models: . API GL-5 synthetic gear oil, Viscosity SAE 75W-90 Except for AT and NISMO models: . Genuine NISSAN Differential Oil Hypoid Super GL-5 80W-90 or

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Old 03-05-2020, 08:04 PM   #1 (permalink)
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For AT and NISMO models:
. API GL-5 synthetic gear oil, Viscosity SAE 75W-90
Except for AT and NISMO models:
. Genuine NISSAN Differential Oil Hypoid Super GL-5 80W-90 or equivalent
conventional (non-synthetic) oil


Just curious....this is from the owners manual. I notice a lot of you are putting synthetic diff oil in. Why would nissan recommend this and why are most all of you ignoring it....just asking because i want to do the right thing for my vehicle. What would it hurt to put a synthetic oil ( im asking because this is what i have available in my garage) instead of convention in my Z sport?


Thanks in advance!
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Old 03-05-2020, 10:07 PM   #2 (permalink)
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Quote:
Originally Posted by Chad7088 View Post
For AT and NISMO models:
. API GL-5 synthetic gear oil, Viscosity SAE 75W-90
Except for AT and NISMO models:
. Genuine NISSAN Differential Oil Hypoid Super GL-5 80W-90 or equivalent
conventional (non-synthetic) oil


Just curious....this is from the owners manual. I notice a lot of you are putting synthetic diff oil in. Why would nissan recommend this and why are most all of you ignoring it....just asking because i want to do the right thing for my vehicle. What would it hurt to put a synthetic oil ( im asking because this is what i have available in my garage) instead of convention in my Z sport?


Thanks in advance!
I would disregard this manufacturers recommendation as any quality synthetic API GL-5 differential fluid will suffice for our application. A 75W90 gear oil is a suitable replacement for a differential calling for an 80W90 or SAE 90 gear oil. I recommend 75W90 synthetic Redline gear oil or equivalent.
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Old 03-05-2020, 10:19 PM   #3 (permalink)
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Changing your differential fluid on time is key. Not changing your differential fluid on time or when required is detrimental. I try to keep taps on my differential and change my differential fluid every 30K or 3 years. Attending track events I will change differential fluid after every event. Inspecting my differential fluid during a flush and refill I have found very small pieces of metal in my differential fluid before.
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Old 03-06-2020, 07:58 PM   #4 (permalink)
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Thank you sir! I agree a synthetic high quality gear oil is mandatory.....It just is odd why Nissan would recommend two different types of oil. The differentials are the same on the Nismo and Sport....correct?
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