Hello everyone. I am planning on changing my front and rear differential fluids during the next oil change. I daily drive my car and do some spirited driving.

I am thinking about using Motul products since I have heard many good things about it. Perhaps it's a bit of an overkill for how I drive my car, but it gives me a peace of mind. However, I am not sure which to use or most appropriate for my 2012 G37xS coupe. Please advise.

1. Motul Gear 300 75w-90
https://www.motul.com/gb/en/products/gear-300-75w90

OR

2. Motul Gear 300 LS 75W-90
https://www.motul.com/us/en-US/produ...r-300-ls-75w90

OR

3. Motul 90PA
https://www.motul.com/ca/en-US/products/90-pa

I've searched and could not find much other than those posted in DIY. Please help out and thanks in advance.

I am also open to suggestions.

 

75-90 reg is fine

 

Thanks for replying.

If you don't mind me asking, but what do you mean by "regular"?

 

You don't need the extreme oil

 

ok, got it! Thanks.

 

So in terms of using regular gear oil, the G37xS manual indicated 80w90 gear oil.

Has anyone use 75w90 for both the front and back in an AWD? Would that be okay?

 

Anyone? Any ideas?

Is the 80w90 and 75w90 really that different?

Dealer said to use 80w90 to prevent any noises coming from the differential. How true is this?