Honda/Acura MTF I (just called "MTF") is a 30W conventional oil with a Honda additive package.
Honda/Acura MTF II ("white cap") is an ATF-based <20W fluid with Honda friction modifiers. It pours like water.
Honda/Acura MTF III (Euro only) is a semi-synth 30W oil with a Honda additive package.
All are made by Idemitsu for Honda.
Couldn’t find a “data sheet” for Honda‘s
MTF-3 but at least a
safety data sheet (mixture etc etc), which tells experts more than just a simple “data sheet”, I think:
https://www.intercars24.ee/files/getfile/file=MDE5OTMxXDA4MjY3OTk5MGhlXzA4MjY3OTk5MjBoZV8gZW4ucGRm
Product code:
0826799902HE
All in all – Honda‘s
MTF-3 is an
almost (1-5% mineral oil within the mixture – see pdf page 2!) full-synthetic oil with the viscosity
75W-80 (Flash point
181 °C).
Btw - this photo is taken from the Honda/Acura NSX shop manual/supplement ´97 (English version) for NSXs with EU-Specs:
Quote:
“If Honda MTF[-3] is not available, you may use an API service SG or SH-rated motor oil with a viscosity of SAE 10W-30 or 10W-40 temporarily.
Motor oil can cause inceased transmission wear and higher shifting effort.”
And here is
WHY – in general – a (semi- or almost full-)
SYNTHETIC oil/fluid like the MTF-3 (approved by Honda for NSXs in Europe!) is much much better in a gearbox than using an organic/mineralic motor oil …
Anyway …
https://www.idemitsulubricants.com/product/idemitsu-racing-gear-oil-75w-90-manual-transmission-fluid
Specs/data sheet:
https://www.idemitsulubricants.com/dA/6305902ec3/tds-75w90.pdf
That means,
IF IDEMITSU is indeed the manufacturer of Honda’s MTF-3 (as mentioned by
@Honcho), NSX owners in US/Canada can ignore the red “
?” in the pic above and you can use this stuff (Flash point
232 °C) as an equivalent to the MTF-3 (Flash point
181 °C) in Europe, I think. Especially, if you’re a track guy because (if the specs in the idemitsu-pdf are correct!) the viscosity (90) is even somewhat higher than for the MTF-3 (80).
Disclaimer:
YOU DON’T HAVE THE RIGHT TO BLAME AND/OR TO KILL ME IF YOUR GEARBOX BLOWS OFF DUE TO USING ANY OF THE PRODUCTS MENTIONED ABOVE!