STI: Red Line, though I may try Royal Purple at some point.
Audi: the last of my supply of old Mobil 1 is in it now topped off with some GTX.
F150: Dino.
Filters:
http://www.iwsti.com/forums/2-5-lite...ions-pics.html
This is the filter I will be trying when I run out of OEM black filters...
Purolator PureONE PL14610 (Oversized)
You could not pay me to use the new blue filters or most any of the others.