Dezoris

I guess is my diatribe I failed to mention Honda MTL is first choice, if you have problems or drivability issues with the trans, switch fluids. I am sure others will agree.

Based on Rick's tests, he said the s2000 trans did not reach full operating temp for 10 minutes of driving which if you think about it, is quite awhile in actual seat time.

This would explain strange notchy shifts on cold starts on almost all of these cars new and old.

The weird cold trans notchiness does not count as a problem, grinds do.

Popeye

Redline MTL

RazorV3

i've had good luck with honda mtf, i do annual fluid changes.

Road Rage

I suggest reading the analyses I posted a while back.

It shows why Honda MTF and Red Line MTL are well respected - they have very similar chemistry, especially in the friction modifier that most affects synchro action. Any other lubricant is a crap shoot - it could be better or worse, and certainly puts in-warranty cars at risk if something really fouls up.

The main difference is that Red Line has a base stock that has significantly greater resistance to shearing and (change in viscosity) and higher film strength. It also explains why Honda MTF needs regular, frequent replacement, as Razorv3 explained and practices. The analysis of Honda MTF was from an Integra, but was pretty well shot at 18k miles. Honda MTF is essentially engine oil with higher levels of zinc/phosphorous than SL-rated oils have today. Red Line MT-series lubes are gear oils, or 75w/80 for MTL, and 90w for MT-90.

I am using MTL in my 2004 with excellent results, but have yet to try it in 99 deg conditions. Some recommend a mix of MTL and MT-90, and others run 100% MT-90.