I try to flush my system every other year and I live in the Sacramento CA area, where our rainfall is 13 inches annually and the typical humidity is 40% (thats why they call it high desert.) Flushing the system is easy on these cars even without a power bleeder. But get a turkey baster from the market to use as a syringe and evacuate all the old fluid from the reservoir and refresh it (no sense pushing any more old fluid through the lines than you need to), and begin from the rear of the car opening one bleeder port at a time. Get a correct type of bleeder wrench for your size screw,; put the wrench on the port and hold it on with a length of rubber hose that will fit tighly on the nipple. Open the port (1/4 to 1/2 turn); put the hose in a mason jar with an inch of fresh fluid in the bottom; then push the pedal down about 3 times, all the while refreshing the fluid in the reservoir.
I don't prefer DOT 5 BECAUSE it doesn't hold the water in suspension. I figure its like motor oil holding dirt in suspension; if you change it often enough, you shouldn't have any problems, and I don't. Either way, if the fluid is not changed periodically, rust will form on the back side of the wheel cylinders and when you change pads, you'll drive that crap back into the system or into a seal which will fail prematurely. Like the man said, it's just PM.

Dean in Folsom (yes where the prison is)

69-144 73-145 82-245