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#4618896 - 12/30/17 02:44 PM Which diff oil for an Infiniti Q50 hybrid
MVAust Offline


Registered: 01/06/16
Posts: 9
Loc: Sydney, Australia
We just picked up a 3 year old Infiniti Q50 hybrid with 30k km on the clock. The hybrid is such an underrated car. Its possibly the fastest hybrid this side of a Tesla.

Since we picked this up secondhand we want to do a diff oil change even though its suppose to be maintenance free.

Amsoil website states it can use severe gear oil GL5 75W90 or 75W110.

Which one should we use?



Edited by MVAust (12/30/17 02:53 PM)

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#4618900 - 12/30/17 02:59 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
JimPghPA Offline


Registered: 08/22/09
Posts: 3859
Loc: Pittsburgh,PA U.S.A.
Isent 30k km way too early to be thinking of changing the differential oil.

Something like 80 to 120 k miles is what I would run it to before changing.
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#4618906 - 12/30/17 03:20 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
JHZR2 Offline



Registered: 12/14/02
Posts: 41802
Loc: New Jersey
Interesting car. 4.9s 0-60 is quick.

Does the manual give you any clues?

My suspicions are that a 75w-90 sun would be good, and you can't beat SVG.

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#4618910 - 12/30/17 03:24 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
Dyusik Offline


Registered: 09/26/14
Posts: 1984
Loc: US-WA
I would go with a 90, I doubt you'll be towing with that thing.
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#4618925 - 12/30/17 03:41 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
PimTac Offline


Registered: 03/04/17
Posts: 4329
Loc: Soviet State of Washington
Those Q50s are sharp looking. I take it no owners manual in the car? Definitely make sure whatever goes in meets Infiniti specs.

This is the US owners manual for 2015. I just guessed the year. Australia may have their own site

https://owners.infinitiusa.com/content/m...wner-manual.pdf
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#4619023 - 12/30/17 05:09 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
donnyj08 Offline


Registered: 08/12/12
Posts: 3034
Loc: Cincinnati
I really like the Q50. Nice looking sedan. I would check nissans specs since the car is likely under warranty. I may even be inclined to buy the gear oil from the dealership.


Edited by donnyj08 (12/30/17 05:10 PM)
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#4619044 - 12/30/17 05:32 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: JHZR2]
MVAust Offline


Registered: 01/06/16
Posts: 9
Loc: Sydney, Australia
Manual says the diff oil is in for life. The 75w-90 SVG is cheap and its easy to change. This gives me piece of mind knowing that the metal particles are removed early.

Yeah its a quick car for a hybrid and I'm getting on average about 6.5litres/100km (approx 36 MPG) in city driving.
Lots of torque at very low RPM (combine total torque something like 550Nm)


Edited by MVAust (12/30/17 05:33 PM)

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#4619046 - 12/30/17 05:39 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
The Critic Offline


Registered: 08/30/04
Posts: 19809
Loc: CA
We fill the non-hybrid Qs with Amsoil 75w90 synthetic.
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#4619355 - 12/31/17 02:34 AM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
MVAust Offline


Registered: 01/06/16
Posts: 9
Loc: Sydney, Australia
Just completed the diff oil change, used Amsoil 75w90 Severe gear oil. The original diff oil was of fine silvery metal particles which was expected. the magnet was also full of metal particles clinging to it.

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#4619444 - 12/31/17 07:39 AM Re: Which diff oil for an Infiniti Q50 hybrid [Re: MVAust]
zeng Offline


Registered: 09/01/15
Posts: 2189
Loc: Malaysia
Originally Posted By: MVAust
Just completed the diff oil change, used Amsoil 75w90 Severe gear oil. The original diff oil was of fine silvery metal particles which was expected. the magnet was also full of metal particles clinging to it.

These are indications of 'inadequate' operating viscosity .... and is best served by upping a viscosity grade or two, never mind OEM recommendation who supposedly knows best.

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#4619972 - 12/31/17 05:38 PM Re: Which diff oil for an Infiniti Q50 hybrid [Re: zeng]
MVAust Offline


Registered: 01/06/16
Posts: 9
Loc: Sydney, Australia
Originally Posted By: zeng
Originally Posted By: MVAust
Just completed the diff oil change, used Amsoil 75w90 Severe gear oil. The original diff oil was of fine silvery metal particles which was expected. the magnet was also full of metal particles clinging to it.

These are indications of 'inadequate' operating viscosity .... and is best served by upping a viscosity grade or two, never mind OEM recommendation who supposedly knows best.


As this is the first time the diff oil has been changed, I expected the wear in metals suspended in the diff oil.
Majority of the dealers and owners don't even change the diff oil for the life of the car.

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