I run Mobil 1 T&S in both Taurus sedans, in order to simplify my oil stock amd also because I need to in the older one due to oil consumption with a light oil.
I've been 'playing' with the intake vacuum on the older one, and recently changed from the stock PVC valve to one for a Mustang 5.0L. I didn't that is was for a Mustang as I just compared similar looking units and picked one where the plunger sat lower when it was held upside down. Another difference that I've noticed is that the plunger travel is less, so overall it will have a lower flow rate. It still passes the 'hold stiff paper test at idle' test with flying colors, so I'm not as worried about the flow rate being too low. It runs a lot better a highway speed, starts up with more authority, but I still need to chase down a hesitation off of idle (suspect the brake booster is leaking at a low rate). A coworker said that the 5.0L Mustang has a lower idle vacuum due to the higher lift cam, which should work well on my older, tired, but not dead Taurus.
Using the 5.0L Mustang PCV valve I've noticed that the oil consumption has slowed way down, which is another benefit.