the end of the gear oil debate - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

uiuc240 · 07-24-2002, 12:04 PM

Check this out.  I just got off the phone with Amsoil.  The GL-4 vs. GL-5 debate is officially over.  The problem has been rectified.  As long as the oil has been tested for MT-1 compatibility, it will work fine with "yellow metals" like brass/bronze synchros.  So, you may all rest assured that it's OK to put GL-5 in your tranny as long as it's MT-1 tested and approved.  Yay!  3 more bottles of Amsoil Series 2000 75W90 to go with my new B&M shifter please!!  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

'>

Eric

*sykikchimp* · 07-24-2002, 12:18 PM

What are the benefits of GL-5 over GL-4?  I think the Red Line MT-90 is GL-4 oil, and thats what I have.  Should I move to GL-5?  I know Amsoil kicks ass, soo..

uiuc240 · 07-24-2002, 12:37 PM

GL-5 is even more resistant to heat.  It's better all around.  And it's more common and easier to find.  Sorta like DOT 4 brake fluid is starting to become easier to get than DOT 3.  If you like Redline, stick with it.  I just have had good luck with Amsoil, so I'm staying loyal to them.

Eric

07-24-2002, 12:04 PM	#1
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	Check this out.  I just got off the phone with Amsoil.  The GL-4 vs. GL-5 debate is officially over.  The problem has been rectified.  As long as the oil has been tested for MT-1 compatibility, it will work fine with "yellow metals" like brass/bronze synchros.  So, you may all rest assured that it's OK to put GL-5 in your tranny as long as it's MT-1 tested and approved.  Yay!  3 more bottles of Amsoil Series 2000 75W90 to go with my new B&M shifter please!!  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''> Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

07-24-2002, 12:18 PM	#2
sykikchimp WOW addicted Join Date: Dec 2001 Location: the moon Age: 44 Posts: 6,525 Trader Rating: (0) Feedback Score: 0 reviews	What are the benefits of GL-5 over GL-4?  I think the Red Line MT-90 is GL-4 oil, and thats what I have.  Should I move to GL-5?  I know Amsoil kicks ass, soo.. __________________

07-24-2002, 12:37 PM	#3
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	GL-5 is even more resistant to heat.  It's better all around.  And it's more common and easier to find.  Sorta like DOT 4 brake fluid is starting to become easier to get than DOT 3.  If you like Redline, stick with it.  I just have had good luck with Amsoil, so I'm staying loyal to them. Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)