Ok so what your saying then is that i should never change my ATF if it hasn't been changed every 40K miles? The car was bought used and i have no idea if the tranny fluid has ever been changed. Do you think i should still go ahead and change it? Also no one really answered me regarding the "gunk trans-fusion" tranny treatment. It comes in a one quart bottle and says to add the entire thing.....So I am assuming that after i drain the tranny of fluid i would only add in 1.5 or 2 quarts of honda brand ATF and this one quart bottle of additive?