02 Accord V6 auto just turned 50K. As a rule of my thumb, I always change trans. fluids every 50K as it has worked well for me in the past. However, these were older vehicles. Do you think I should go ahead and drop the trans fluid and replace with new? From all I can gather here, everyone pretty much suggests staying with the Honda ATF-Z1 fluid. Is that stuff synthetic? Does any know? Has any one tried anything different than the Honda fluid and have good, if not better, fly by the seat results? How much of it will it take? I don't look forward to pouring the fluid into that hard to get at dipstick hole. I am not going to drop the pan. The trans. has a drain plug in it. This car is 98% highway miles.