LE 607, best

 

i used lucas oil 75W/90 if NHRA can use it with sucess then it should be good for the S.

 

Amsoil 75-140 GL-5

 

They dump the oil and use something else to get the sponsership.

 

I've always used Mobil 1 - no issues so far.

 

 

i am using some jdm tomei synthetic rear differential gear oil gl5. 75w-90w. honda recommends any
compatible gl-5 classified gear oil usually about 75w-90w. synthetic or not.
with original fluid from factory had noise from the rear diff when taking sharp turns, after putting the tomei diff fluid noise is gone. seems a lot smoother.expensive though.

 

ive been usin royale purple with no problems i think its really a matter of opinion everything works fine no matter what fluid you use just depends on the type of driving you do and what wheight fluid it is.

 

i have royal purple in mine right now but im going to try amsoil next.

 

I use Motul Gear300 75W90.. it's like $10 a qt and you only need a little under a qt.