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View Full Version : Rb25 gear oil mobil 1?

dreamin240sx
05-09-2012, 09:11 PM
Hey guys I've been looking at Mobil 1 synthetic 75w90 gear oil for my RB. Would this be a wise choice. I have been searching for quite a while and I just can't seem to get the answers for what I'm looking for. Any help is greatly appreciated thank you.
NismoFoLife
05-09-2012, 10:43 PM
I don't know about gear oil but i stay away form mobile one engine oil. I just put amsoil 75w90 synthetic in my Sr and that stuff legit, redline is good and i hear valvoline is good stuff as well hope that help a bit.
dreamin240sx
05-10-2012, 11:12 AM
Ok thanks buddy I'm just picking up oil today so I'll look into those other brands
kojiki88
05-10-2012, 11:31 AM
I don't know about gear oil but i stay away form mobile one engine oil. I just put amsoil 75w90 synthetic in my Sr and that stuff legit, redline is good and i hear valvoline is good stuff as well hope that help a bit.

+1 on Amsoil!
singlecamslam
05-10-2012, 11:31 AM
I use mt90 in my rb tranny, seems to like it.

I think theres a multiple page thread about gear oil as well.
KendallH
05-10-2012, 11:34 AM
Amsoil 75w90 when I had my rb. Never had any problems.
PrimeDirective
05-10-2012, 11:43 AM
That Mobil synthetic gear oil is GL-5 and I thought I had read somewhere that RB transmissions like GL-4 better. I think its because GL5 is bad for brass synchros. I will update with a link if I can find it.

I got some AMSOIL 75W-90 Synthetic GL-4 it works great.

Also you need ~3.75L of fluid to fill the transmission.
dreamin240sx
05-10-2012, 11:54 AM
Ok I'll definetly check into amsoil today thanks guys
mantas
05-10-2012, 12:08 PM
I used mobil 1 and my trans would be notchy before it warmed up - about 2-3 miles. So someone recommended Motul, and I will never buy any other gear oil again.
fliprayzin240sx
05-10-2012, 06:36 PM
That Mobil synthetic gear oil is GL-5 and I thought I had read somewhere that RB transmissions like GL-4 better. I think its because GL5 is bad for brass synchros. I will update with a link if I can find it.

I got some AMSOIL 75W-90 Synthetic GL-4 it works great.

Also you need ~3.75L of fluid to fill the transmission.

^^^THIS!!! GL4 only, GL5's hate nissan transmissions...
Kingtal0n
05-10-2012, 06:46 PM
^^^THIS!!! GL4 only, GL5's hate nissan transmissions...

GL-4 "mt90" Redline synthetic. Yes.
AS240
05-10-2012, 11:38 PM
redline lightweight shockproof aka smurf blood.
tranny feels like butter