I had an 06 Civic and recall it was very easy to change the fluid. I do remember it shifting very nice after changing it at approximately 50,000 miles. The job was very easy and I used some sort of Pennzoil MTF but cannot remember the exact formula. I would just buy a couple quarts from a local Honda dealer and call it good if you have any doubts. You can trust Honda to have the correct fluid for your vehicle.