I've changed my power steering fluid three times using the suction method. I stick the tube in the reservoir and siphon the fluid out until it's empty and fill it back up with some fluid. I am about to do it for my fourth time and the car has 100k miles. Is 4x enough or should I do it again? Does changing the fluid really help or is it a waste of time and money?

 

According to Nissan we're supposed to change all fluids every 30K miles so you're right on with the powdersteering fluid. If you've changed the trans/differential/radiator fluids your perfect, no it's not a waste of time or $....Gary

 

I have done a coolant drain/fill, transmission flush, differential fluids changed, belts changed and filters changed and changed the oil in the past 2,000 miles because I had no idea what the previous owner had done. I also purchased all matching tires. The only thing left is the brake fluid.

 

Good Job!....^....That's the way to take care of a used car when you first buy it! Brake fluid swap is much easier when you get your next oil change, on a rack in the air....Gary