PDA

View Full Version : Best gear oil for RB25?

KendallH
09-27-2011, 10:27 PM
Getting close to dropping my RB25 in. I searched and came up with mixed results. My swap came with a bad transmission and I purchased a new one (don't want to do that again soon). It will mostly be a daily driver with occasional track time.
Pandapants
09-28-2011, 05:35 PM
Im using lucas gear oil and absolutely hate it. Thinking about switching to Amsoil
KendallH
09-28-2011, 06:15 PM
Did some more reading around and its looking like Redline MT90 is the go to fluid for a street car.
motoxris
09-28-2011, 10:15 PM
I know a few people that are blowing trani's on redline and switched to royal purple. But I think amsoil makes pretty good trani oil.
MADE
09-28-2011, 10:17 PM
Currently using AMS Oil. can't say which is the best and doub few on the board can. Just their opinions, and where they choose to spend thier money.
fliprayzin240sx
09-29-2011, 09:42 PM
Anything that's GL-4...do not run GL-5 oil in Nissan trannies. Hot GL-5 oil does not like brass synchros.
Newtypex
10-01-2011, 08:50 PM
Redline shockproof lightweight.
Kingtal0n
10-02-2011, 06:54 PM
Anything that's GL-4...do not run GL-5 oil in Nissan trannies. Hot GL-5 oil does not like brass synchros.

good old Redline MT-90 synthetic, yes this is what you want if you love your transmission.
KendallH
10-02-2011, 07:00 PM
Thanks for the input guys :) think I'm gonna go with the MT90, if any funniness occurs I'll switch it up to something thicker
garagelu
10-02-2011, 07:06 PM
MT-90 sucks! It takes forever to warm up and shifting feels very notchy. Switched from MT-90 to Amsoil and shifting feels like butter all the time.
fliprayzin240sx
10-04-2011, 05:26 PM
+1 on Amsoil...
SinGarage
10-10-2011, 12:11 PM
MT-90 sucks! It takes forever to warm up and shifting feels very notchy. Switched from MT-90 to Amsoil and shifting feels like butter all the time.


I also agree with MT-90 taking forever to warm up = notchy until warm. I also recommend Amsoil or Motul. Running Motul on my RB25 trans.
fliprayzin240sx
10-11-2011, 08:47 PM
I'm a firm believer on Amsoil...fixed my SR's notchiness and after beating on it, I had almost no shavings on the drain bolt after a good year of running it.
97nismo
10-22-2011, 05:35 PM
what amsoil weight for sr20 trannies?
frankd_13
10-22-2011, 06:47 PM
use red line. if u use any thing else make sure u use a friction modifier.
GSXRJJordan
10-22-2011, 06:51 PM
Amsoil Severe Gear 75W-90.

That's what we run in all of our non-GM manual transmissions, and results in the coolest trans temps and best results while hot.

We have it in stock all the time, you need just over 2qts IIRC.