Is 140w gear oil too thick? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

RinkyDinkyZenki · 09-21-2015, 06:50 PM

I've been looking around for gl-4 gear oil and so far all I've found is oreilly brand straight 140. Just wondering if that would be too thick for the KA trans.

PoorMans180SX · 09-21-2015, 07:01 PM

I am using straight Redline lightweight shockproof in my trans, and it seems to like it. Lightweight shockproof has the film strength of 75w140, but lower fluid friction.

The problem with heavy normal gear oil is it normally sucks when cold, and has higher fluid friction which robs horsepower.

Wow I sound like a Redline oil brochure.

But alas, don't run that junk in your trans! Buy some good stuff, it's not like you're going to change it anytime soon. PM me if you don't have a local retailer.

Croustibat · 09-22-2015, 01:58 AM

I have always searched for alternatives, but after some tries the redline mt90 is the way to go. You could get 75w90 gl4 from nissan too, but it still is not as good as the mt90.

OddyseusDSM · 09-23-2015, 07:38 PM

mt90 gl4, made the mistake once when younger. With 140wt it wont shift below 35 degrees without double clutching.

RinkyDinkyZenki · 09-23-2015, 08:34 PM

I appreciate the replies. I went ahead and ordered the mt90. I was able to get a discount on it too so that's nice haha

Tom N · 09-24-2015, 10:50 PM

Motul 300 for the trans and Shock proof for the rear.

codyace · 10-01-2015, 08:29 PM

Quote:

Originally Posted by OddyseusDSM

mt90 gl4, made the mistake once when younger. With 140wt it wont shift below 35 degrees without double clutching.

Quote:

Originally Posted by Croustibat

I have always searched for alternatives, but after some tries the redline mt90 is the way to go. You could get 75w90 gl4 from nissan too, but it still is not as good as the mt90.

Same here. MT90 FTW!

omgosh · 10-02-2015, 12:12 AM

09-21-2015, 06:50 PM	#1
RinkyDinkyZenki Join Date: Aug 2015 Location: NC Age: 27 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	Is 140w gear oil too thick? I've been looking around for gl-4 gear oil and so far all I've found is oreilly brand straight 140. Just wondering if that would be too thick for the KA trans.

09-21-2015, 07:01 PM	#2
PoorMans180SX Zilvia.net Advertiser Join Date: Nov 2005 Location: Michigan Age: 36 Posts: 5,573 Trader Rating: (16) Rides Gallery: PoorMans180SX Feedback Score: 16 reviews	I am using straight Redline lightweight shockproof in my trans, and it seems to like it. Lightweight shockproof has the film strength of 75w140, but lower fluid friction. The problem with heavy normal gear oil is it normally sucks when cold, and has higher fluid friction which robs horsepower. Wow I sound like a Redline oil brochure. But alas, don't run that junk in your trans! Buy some good stuff, it's not like you're going to change it anytime soon. PM me if you don't have a local retailer. __________________ Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs.

09-24-2015, 10:50 PM	#6
Tom N Zilvia Addict Join Date: Oct 2012 Location: SW Florida Posts: 746 Trader Rating: (1) Feedback Score: 1 reviews	Motul 300 for the trans and Shock proof for the rear. __________________ 98 240sx w/ S15 SR20DET, T2 20g, 11.22 @ 124.98

10-02-2015, 12:12 AM	#8
omgosh Zilvia Member Join Date: Mar 2005 Location: Tampa FL Posts: 210 Trader Rating: (0) Feedback Score: 0 reviews	__________________

09-22-2015, 01:58 AM	#3
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 43 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	I have always searched for alternatives, but after some tries the redline mt90 is the way to go. You could get 75w90 gl4 from nissan too, but it still is not as good as the mt90.

09-23-2015, 07:38 PM	#4
OddyseusDSM Zilvia Junkie Join Date: Jan 2009 Location: NL, CT Posts: 373 Trader Rating: (4) Feedback Score: 4 reviews	mt90 gl4, made the mistake once when younger. With 140wt it wont shift below 35 degrees without double clutching.

09-23-2015, 08:34 PM	#5
RinkyDinkyZenki Join Date: Aug 2015 Location: NC Age: 27 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	I appreciate the replies. I went ahead and ordered the mt90. I was able to get a discount on it too so that's nice haha