What kind of trans fluid should i run in my EF is a 91 SI

 

use motor oil like the service manual says
10w30

 

thanks

 

in the summer, use 10w30
in the winter, use 5w30
5w30 is thinner, easier on the engine...

 

Motor oil was reccommended before Honda made MTF.

Go to the dealership and get Honda MTF, its way in the hell better than motor oil.

 

+1 on Honda MTF....motor oil can be used only in emergency situations.

 

honda MTF, but i have penzoil syncromesh in mine right now. works fine, no grinds

 

wtf you talking about lol, emergency situations?? lol learn to read a service manual before ya hope on the band wagon and agree with everyone else

Honda MTF is fine but $$
The service manual call for 10w30 iv ran it in all my Hondas for many years with no probs at all.

 

I switch depending on the temperature... 5w30 works well when it is Canadian Winter time. 10w30 otherwise.

 

I used motor oil ever since I bought the car new. There was no such thing as mtf 20 years ago. I recently put mtf in and it seems a little smoother.

 

my trans leaks so screw wasting honda MTF. once i fix this seal ill be running GM syncromesh.

 

ive always ran motor oil in mine as well, no problems at all

 

right now, im havin crx si and when i put the 5 gear and im havin a hard time to put 5 gear on so obiviously it needs the manual fluid for that? so lmk about it, thanks

 

Honda owner's manuals from around 1991 and earlier specify ordinary engine oil (10W-30 or 40). But then engine oil chemistry was changed industry-wide, because the zinc in engine oil was leading to early failure of catalytic converters. OTOH, the zinc is key to assisting in "extreme pressure" conditions such as that experienced in gears. The remedy is to use Honda OEM MTF, which has the zinc, or possibly some other MTF with the required additive. Today's ordinary engine oil is not as good for the long run. The good news is that the Homda OEM MTF can stay in much longer, so it is about the same cost as engine oil. Chatter at http://honda.lioness.googlepages.com/manualtrannyfluid

 

Honda MTF

 

just bought 2 quarts of honda mtf to put in this weekend. I had 10w30 in until i inherited the car, then ran redline MTL for a few thousand miles and liked it. Then went to Redline superlight gear lube which I had great success with in the past and now have a terrible crunch into 2nd at high rpm's. Im pissed for not sticking with what I knew worked, so Im hoping the honda MTF is a bit of a bandaid until i get some money to do a full trans rebuild. The superlight felt SOOO good for the first 3K miles. Buttery smooth and perfect, then it went downhill quick. ****!

 

Honda MTF is not that expensive. Its like 7 bucks a quart mabye and its not like you change it every 3k anyway. If 15 bucks is too much money you've got the wrong hobby.

 

yeah, use the honda mtf
i used 10w30 for alot of my cars too.
i liked the mtf better.
my type r had a slight grind in third when i power shifted.
after putting mtf in it, the grind went away...
besides its only 2 quarts, spend the money...

 

walmart sells, an accel brand oil SF motor oil for 88 and older cars, im guessing that it has the zinc, its like $3 a quart, i havent changed the oil in my traanny yet, it prob still what came in there, im thinking im gonna put either the honda MTF or 10w30 synth in there

 

would 75-80 not be fitting for a 89 si tranny?

 

No sorry, it would be way to thick honda's have pretty complicated transmissions. So like said Honda MTF or 10w30 or 10w40 only. Anything else and you will be sorry and wishing you had not. Its only 15 for the honda mtf so why not shell it out you only change it once a year.