So I just purchased a new vehicle (2008 Subaru Legacy Special Edition 2.5Liter) and was getting ready figure out my maintenance schedule and what Items I need when I notice something interesting. Vehicle recommends a (Fram number) PH9715 which on their website lists its competitor as Supertech 6607. So I compared on their website the difference between the a Fram 6607 and a 9715 the 9715: 2.57" tall 2.69" outer diameter relief valve setting 12-14 PSI the 6607: 2.63" Tall 2.84" outer diameter relief valve setting 13 PSI both are 20mmx1.5mm threads So my question would be comparing the two filters wouldn't the 6607 be a better choice? larger more filter element and about the same relief valve setting... I know people have their pros cons about Fram but it was just used a an example. I only use their XtendedGuard filters anyway or Napa Gold (but neither of the two come in an XG fram). I'm just trying to way in the options and get the Used Car Dealer Crud out of the engine as soon as possible.