I use the Slick 50 Power Steering fluid, I had Mazda van that the Power Steering Pump squealed all the time, instead of changing it out I replaced the fluid with Slick 50 and it Stopped. Saved about $200

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2000 Ford 7.3 Powerstroke 4x4
2006 Mazda Tribute
1983 Black 300 D (donated to charity)
1993 Teal 300 D (160K) Sold
"I love the smell of burnt diesel fuel in the morning, it smells like ....VICTORY"

Semper Fidelis
USMC 1973-1976