Actually the trend I have seen is less and less media in everything. I have been cutting open filters and recording the area for over 10 years. It might be interesting if somebody has current figures for conventional and Ecore PF 47 and PF52.
Brand-----P/N----Length width area Fits---endcaps---mfg--valves
Older data, 2000 ?
AC Delco--PF9-------102 2 1/2 255 77 LUV
STP-------S02856A---108 1 3/4 189 ''
Purolator L10193----105 1 3/4 184 ''
Power Flo SL14619----76 2 3/8 180 ''
Hastings--LF143------71 2 1/2 178 ''
ST--------ST3950-----98 1 3/4 171 ''
Fram------PH 3950----48-1 3/4--84 ''
2003 filters
Miata-----B6Y214302--69 1 3/4 121 1991 Roadster
AC Delco--PF2244G*---46 3-----138 02 Cavalier--------France
STP-------9018-------57 2 1/2 143 ''-----------------Korea
Purolator L15436-----52 2 1/2 130 ''-----------------Thailand
WIX 57082 Never got around to measuring it.
22 Aug 03 filters were a year or 2 old
ST--------ST3950-----84 1 3/4 147 77 LUV--------metal---------ADBV bypass
Purolator L10193**---76-----2 152 ''-------------card USA '' ''
Purolator L10193-----96-----2 192***''----------metal India '' far end
AC--------PF1177-----92 2 1/2 230 ''-------------card Canada ''
AC--------PF 47------56-----2 112 92 GrandAm----metal ''
AC--------PF 52------53 3 3/4 198 '' OS---------''----''
ST--------ST 3387A---46-----2--92 '' ''----------------USA ''
ST****----ST3950-----90---2.1 189 77 LUV--------Metal--------ADBV, bypass
ST 6-05---clicker '' 90 1 3/4 157 ''------------------------''---USA--ADBV, bypass '' ''
Purolator 9-08 L10193 64 1.75 112 ''--------''---USA--ADBV, bypass '' ''
2009 data
Purolator L10193-----75 1 3/4 131 ''-------------''---USA--ADBV, bypass '' ''
MicroGuardGL10193----64---1.6 102 77 LUV--------metal USA ADBV, dome
STP-------SO3950-----73 1 3/4 128--''-----------metal USA ADBV, dome
AC--------PF457------64---2.3 147 02 Cavalier plastic USA no valves (Hengst)
Dynalube--D5436------59--2.25 133 02 Cavalier plastic China
*The AC, Hastings, and Fram all said PURFLUX L264A on the end of the plastic housing.
**Interesting 1 piece of rubber for both valves
***The media was noticable thinner than the others
****9-04 newer black case
*The AC, Hastings, and Fram all said PURFLUX L264A on the end of the plastic housing.
**Interesting 1 piece of rubber for both valves
***The media was noticable thinner than the others
****9-04 newer black case