well, for the past week my P.S. pump has been making noise on start up and idle after for a bit. any other time i dont know. i went in for some O.T. today, and did a donut in the snow, when i came out of it, i had no power assist. but now its mainly at idle to 1500 rpm., as long as im moving its fine and above the above rpms... it whines bad if u turn the wheel at idle and a little while going. any ideas? any aftermarket upgrades? and could i use valvoline fluid in it?? thanks ahead!