Originally Posted By: chubbs1
I have the 09 2.5 S VQ25
I think you mean the QR25DE. Factory filter is a "shorty" that cross refs to the WIX 51365, K&N HP-1008, M1-108, etc. as you mentioned. The WIX 31356 or any of the following slightly longer filters will work just fine:
Purolator PureONE PL14610
Mobile 1 M1-110
K&N HP-1010
Bosch D3323
WIX 51356 (or equivalent NAPA Gold)
DENSO 150-1010 (or 150-1009)
I've been using DENSO 150-1010 filters since the factory fill was dumped at 4K miles. While I prefer the slightly longer filters since they have more filtering media, it probably doesn't make any real difference. Even it is pretty small compared to many other filters and the ones I'm used to from yesteryear and my previous vehicles.
The main advantage I have to the longer filter is that the two other vehicles I maintain use the same thing, so I only have to keep one size on my shelf.