8th Generation Honda Civic Forum - View Single Post - DIY: Changing Manual Transmission Fluid
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Old 12-26-2008, 11:48 AM   #434 (permalink)
Oil Doc
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Join Date: Nov 2007
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Bob
Quote:
Originally Posted by ebdiam View Post
75w-90 should be the same weight as 5w-30 its just measured diff, i think..
Negative.... 75W-90 is about the same as 20W-50

Quote:
Originally Posted by joon joon View Post
i dont know... cuz i know amsoil has a fluid thats 75w-90 but the synchromesh is 5w-30 so 2 different things im guessing
AMSOIL MTF 5W-30 is the proper Fluid for the Honda Manual Trans. MTG is the 75W-90 for other applications such as EVO's or Dodge NV 4500 transmissions and others calling for a Gear Lube Type Lubricant. MTF and MTG are not compatible and should never be mixed.

Quote:
Originally Posted by ebdiam View Post
Pretty sure other oils like Royal Purple rate their MTF at 75w-90 while Amsoil rates it at 5w-30, should be the same thing..
Can anyone confirm this?
F stands for Fluid.... G for Gear Lube with AMSOIL...

The following Link is to a Study of Gear Lubes and was performed by Several Independent Testing Facilities which are ISO Accredited..

http://bestoil4you.com/files/g2457GearLube.pdf

What most people don't realize is that there is No Governing Body for Gear Lubes. I could almost bottle some Maple Syrup, use a little sulpher for sniff factor and sell it for Gear Lube... Of course, a good Maple Syrup is way more expensive than Gear Lube and tastes better on my pancakes.

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