It is the original auto transmission. I say do 2 drain/refills per year but I might have done 3 before---the thing I don't like is that when you open the drain plug or suction out the ATF, you only get about 2.5 qts. AND I am very leary of doing the DIY flush where you feed new fluid into the sump while the cooler line expells the old fluid. the worst things on the car now are the driver's seat---leather is shredded, and the windshield has 3 rock bubbles that made a nasty crack spreading low. I would like to go to 500K miles but fear the trans will die---I am planning on swapping to a prelude motor but might just get a used 97 accord that someone thinks has "high mileage" as far as oils go, I believe it depends on how you drive, your goals such as cost, convenience, how long you plan to keep a vehicle. today's vehicles are so expensive, that you could spend 1000 dollars on oil and ATF per year and still be cheaper that a new-ish car. I used cheaper dino's with 3-4K OCI's, and syn from 6-8K and a few times I used Mobil 1 Extended Performance for 10K---but If you look at one of my old posts, I am a firm believer in keeping the oil "clean"....regardless of how much TBN/additives are left, I believe that removing contaminants via oil draining is the most important thing---some people may argue that oil appearance is not important, but I cannot be convinced that leaving an oil in a vehicle for 15K miles is a good thing---if you're not planning on keeping a vehicle for a long time, then it is not a big deal as you will not have it anymore.