It's time for me to change my tranny fluid in my Y21. When I went shopping for oil there's so many different choices I had no idea what to choose. There's synthetic, conventional, conditioned and durable-- and that's just the ones that claim to be the best... Bla.. What does it all mean?

In the past I've heard people swear by redline synthetic oil, and others rave Honda OEM.. I want the best at pretty much any cost within reason (less than $15 qt.) What's the best and why?

Thanks guys!

 

I'm going to have to say Honda Fluid. No one knows Hondas better Honda.

 

Honda MTF
If you dont get honda, just make sure you get a lightweight oil. The factory MTF is close to 30wt.

 

honda mtf and redline mtl

 

redline knows better well maybe not but i love redline

 

AMSOIL ATF or SAE 30 Hydraulic/Transmission Fluid..

contact me for more details...

 

I have tried

Honda MTF
Redline MTF
and Syncroshift

Redline was less notchy than honda, but still notchy overall
Syncroshift was much less notchy than both, my tranny shifts like a dream now.

 

I'll also vouch for BG Synchroshift. Good stuff!

 

what about that gm syncromesh stuff? Anybody used that? I've heard good things about it before.

 

Ive used redline mtl and honda mtf. They are about the same imo, maybe redline slightly smoother.

 

Its the same thing as BG Syncroshift, just rebadged under GM's name.

 

honda mtf=stock engine

redline=modified engine


I've used both and redline is better because it's design for extreme driving where honda mtf is design for daily driving. other's will disagree with me on this but this is my .02

 

I've heard good things about Redline also. I'm trying it out in about a week when I drop my motor back in.

 

Don't use redline. If anyone is familiar with Mista Bone ask him about this. He will tell you to take apart a honda tranny that has used redline and see why not to use it.

 

I would like to know more about this, how many trannies he has taken apart to see the results and how he knows redline was the culprit.

Obviously taking apart one tranny that you had run redline in and finding problems is hardly evidence that redline was the problem. I seem to see that alot around here as far as oil and tranny fluid. (not that this is definetly the case in this situation or anything)

 

Bone has more experience with D-series trannies than anyone i know. I trust anything he says about a tranny more than anything else i read, see, or hear.

 

you can find him at dseries.org

 

correcto.

 

I just changed over from straight 10w30 motor oil to honda MTF and oh my what a difference. The shifts are much smoother and I hardly ever have trouble getting the tranny into 1st from a slow roll like I used to. Definately go with genuine honda stuff, they know what they're doing.

 

I forgot to cast my vote after giving to Redline.

Honda MTF

 

Redline will fry the imput bearings DO NOT USE IT.

I have replaced 5 imput bearings, and all 5 owners of the vehicles used redline for extended periods of time. Tague (Bone) will agree with me on this one.

 

Castrol GTX 10w30. Also Honda MTF is basically just 10w30 motor oil. So dont everyone act like its all special just cause Honda sells it. Some people think the same about Honda oil filters and they are just Fram filters. (made for Honda). Ive never had any problems with 10w30. Been wanting to try out some syncromesh though and see what thats all about.

 

Ya, last time i checked honda filters are made by Nippon denso. And fram filters are american POS.

 

you could not be more wrong. just comparing the two side by side will show there is a difference. honda mtf has stuff added to it that provide the correct amount of friction for the synchros to work, without providing so much friction that you reduce the liftspan of your bearings. honda mtf is great stuff, and is definitely NOT your standard oil.

 

Honda only...