FWIW, My dad just bought a new Crown Victoria...looks just like an undercover cop car...big boat!
The manual says use a 5w-20 oil that meets Ford's specs. It says nothing about voiding a warranty if you use another wt. oil. It also talks about fuel efficiency. So for all the Ford people out there, I really dont' think you should worry about using a 30wt oil. check with your dealer too bc they told me I could use a 30wt (they actaully put in Amsoil 5w-30 oil at my request in my wife's Focus).
[ June 28, 2003, 10:59 AM: Message edited by: buster ]

[ June 28, 2003, 10:59 AM: Message edited by: buster ]