I've been on this site for a while and used a lot of its advice. In my last honda I dumped the Z1 and used Castrol import multi vehicle. It helped a lot! It seems everyone (almost) on here seemes to like the way their car shifts better with aftermarket fluids. Why is that? We dident build the tranny, the aftermarket company dident build the tranny, and come to think of it the OEM fluid company dident either! You would think that the people who did build it and select the OEM fluid whould choose the best one. Or at least a fluid that would let it operate well for a good long time? Why do we all think we know better I guess is my question?