[DR 86]

No need to change the fluid all the time. If you're on stock tires, you probably won't be generating enough grip and carrying enough speed into braking zones to over heat the stock brake fluid for lapping days, but I'd change the fluid to something that can withstand more heat just to be safe. After that, just change the fluid at regular maintenance intervals (sooner if you are tracking a lot) or if you ever boil the fluid. I wouldn't use track pads on the street, as you won't be able to generate enough heat on the rotors with daily driving to maintain the transfer layer of brake pad compound, and very soon after your track day you will be enjoying a symphony of squealing pigs.