which gearbox oil should i use?

[aaronng]

aaronng, you better be joking, lol. I have been told by two differant honda service centers that the 6MT Euro should use 75w90 (apparently the viscosity of Honda MTF 06) I thought it was odd as the integra was spec'd to use MTF 06 however it was 75w80. Interesting. How did you come accross the viscosity required? It doesn't mention in my service book or on the bottle. Which is why I double checked with the service centre.

The Euro definitely requires 75w80. Not sure why those Honda service centers (are they dealers?) said to use 75w90, especially if Honda doesn't sell a 75w90 MTF. I suspect that those service centers use whatever gearbox oil they have in the drum, which is usually 75w90 because that is cheap and common (used by many other car brands). That was the case for my dealer where they used magnatec instead of FEO, just because they could use magnatec in the other cars that they serviced there.

Honda MTF Plus (which is the original Honda MTF) and HondaMTF 06 (which is the equivalent to Honda/Acura MTF II) are 75w80. I have the service manual for the Euro and it says specifically to use MTF II. It even says not to use engine oil in the gearbox, which was actually recommended for older Hondas.

I also have an Acura bulletin announcing MTF II 75w80 (MTF 06) and saying it is for all Acuras/Hondas and that all new vehicles would come with it from the factory beginning 2007.