I hope this isn't against the forum rules for posting this, but a fellow STi owner has posted an interesting analysis of oil filters for the Subaru Impreza WRX STi here:
http://www.imprezawrxsti.com/postnuke/index.php?name=PNphpBB2&file=viewtopic&t=16625
Reviewed are the following filters:
Subaru OEM 15208AA080
Purolator PureONE PL14612
Purolator Premium Plus L14612
K&N HP-1008
Mobil 1 M1-108
STP S6607
WIX 51365
FRAM Extra Guard PH6607
FRAM Tough Guard TG6607
Cheers,
-AndyH
http://www.imprezawrxsti.com/postnuke/index.php?name=PNphpBB2&file=viewtopic&t=16625
Reviewed are the following filters:
Subaru OEM 15208AA080
Purolator PureONE PL14612
Purolator Premium Plus L14612
K&N HP-1008
Mobil 1 M1-108
STP S6607
WIX 51365
FRAM Extra Guard PH6607
FRAM Tough Guard TG6607
Cheers,
-AndyH