Going to be doing a transmission drain & fill on my I35 before fall sets in. I'm usually a proponent of using OEM ATF but I've heard good things about MaxLife and it peaked my interest. Nissan MaxLife users: how do you like it? How are the shift characteristics in both hot & cold weather? . We all know Matic-D is nothing to write home about. I'm not doing a complete fluid exchange as I did this about 20K miles ago already.