Originally Posted By: LeakySeals
sayjac - It seems that complaints like "waviness" may be compression/fitment related. And the fit seems to vary by brand and engine. For example a Fram may fit great on a Honda Accord but not a Toyota Camry, and a Purolator the opposite. What are your thoughts on this? Thank you.
I've seen some cartridges posted here that 'look' to have been compressed with installation. I've also seen some early Purolator cartridges that took on a collapsed/twisted look after use. In the latter case, Purolator acknowleded that an inner/center cage was needed for support and went on to fix the issue. IMO some of the aftermarkets were playing some catch up to oem's early on with more vehicles using cartridges. While I'm sure there are still some exceptions, it seems that all including Purolator are doing a better job. As said, I've had success with the Napa Gold/Wix but I checked out the construction first, also as much as possible making sure that the height/length of the cartridge was the same as the oem to reduce the chance of compression of the filter/media.