I did the tranny and diff a few weeks ago.. def a difference.. alot smoother when its cold and even better when it gets hot

 

im getting my car back 2mrw!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

I have an 05 6MT coupe with almost 4K miles on it now. Changed out the stock Nissan fluid to Spirax S, and boy was there a difference. The shifter is now buttery smooth. The car is definitely more efficient at putting power on the ground now. I can now easily run the engine at 1200 RPM in 6th gear at 35mph in my conservative driving mode.

 

do the diff fluid also... get rid of the metal shavings...

 

Can Shell Spirax S be used in Limited Slip Differentials like ours? I have read the Shell product sheet for this oil and nowhere does it state that its for LSD's. There is a Spirax LS, which I think is not synthetic like the Spirax S.
Do we have to add a LSD additive if we use Sprirax S?

Here's the link for the Sprirax S data sheet:
http://www.shell-lubricants.com/prod...df/SpiraxS.pdf

and Link for Spirax LS data sheet:
http://www.shell-lubricants.com/prod...PIRAX%20LS.PDF

I'm in the NY/NJ area and I have bought 6 quarts of the Spirax S oil but want to make sure it's the right one for our G35 coupes.
I bought it from the location below at $6.00 a quart.
Bolkema Fuel Co., Inc.
75 Mollie Ct.
Mahwah , NJ 07430
Phone: 201-891-1000

Or you can find a local dealer in your area with this link:
http://www.shell-lubricants.com/distributors.php