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Honda MTF3 Specs

SayamaAccord

And still...
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I just replaced my gearbox oil with the Comma version approved for the Accord 75W80 https://www.commaoil.com/passenger-vehicles/products/view/549 and the Spec Sheet says viscosity at 40C is 50 cST and at 100C is 9.3cST.

After the change I noticed it needed higher shifting effort. Not a lot, but enough to be noticeable.

Then I found this spec sheet on the web http://www.flagshiphawaii.com/msds/Alphabetical%20by%20Manufacturer/Honda_Manual_Transmission_Fluid.pdf at at the top of page 5 it mentions viscosities. At 40C 30.7 cST and at 100C 7.2 cST.

So despite the widespread ***umption that MTF3 is a 75W 80, which is shared by some aftermarket sellers such as Comma and Redline, MTF3 is a 75W.

Guys, please spare me the 'This is why you should always use genuine Honda MTF3' lecture, cheers.
 
no comment Cliffy baby.
 
Hehe

To be honest the fluids will be compatible but clearly Honda develop their lubricants to be optimised for their own products
 
This explains the 5 different types of base stocks in oil. https://www.machinerylubrication.com/Read/29113/base-oil-groups

After a big court case in the late 90s between Mobil and Castrol, oil companies are allowed to call Group 3 base stocks synthetic as well as Groups 4 and 5.

The sheet says Group 2 is hydrotreated and Group 3 is hydrocracked

This sheet says MTF3 in 2006 is hydrotreated https://h-tune.co.uk/club/data/attachment-files/2012/08/34243_Honda_MTF-3.pdf

But I am not an oil expert and I know nothing more than what I read on these sheets.

But if I understand it correctly MTF3 is mineral oil not synthetic or at least it was in 2006 and from what I read on the web synthetic is better.
 
This is why synthetic is better than mineral in a gearbox

https://www.youtube.com/watch?v=B8zEpFbM7LY
 
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