as a former GL4 guy (from Mazda and Mitsu M/T days) to now a Honda MTF guy, I realised that the water-thin Honda MTF gear oil does shear over time and in need of regular change in order to maintain that precise shifting. In the case of my fit: I have to change out my Idemitsu based MTF II every approx. 4,5000miles or so in order to maintain that proper shifting feel. Just performed a change (replaced with Acura bottled Idemitsu MTF II, 1.5L worth) on my fit MT gearbox this afternoon and the proper shifting feeling has been restored. Q.