Originally Posted By: Brigadier
Well then my argument would be, why did Kia design an engine that is incompatible with readily available aftermarket filters? And did they tell the purchaser ahead of time about this requirement?
It's not up to Kia to make things easier for Wix, Mann-Hummel, Champion Labs, or Honeywell. And, like I said, Kia probably isn't terribly worried about the consumer using a Wix or a Bosch. They're probably not even that worried about Frams. They're worried about the twenty-five cent jobber filters out there. Kia has no idea that one or more filter manufacturers are going to make shoddy filters, and it's not up to them to make accommodations for that. That being said, they did make accommodations for that by documenting it in a TSB. It's well established that no car manufacturer will warranty engine damage caused by a defective aftermarket filter.
Further, it's up to the aftermarket manufacturer to ensure they properly reverse engineer the filter. If they're not able to do the task, they shouldn't specify the filter for the Kia in question. Amsoil's been up front in the past about filters that may have compatibility issues. All the major filter manufacturers also recommend against using a filter that they don't specify for a particular application (i.e. upsizing).
Considering the OP got the OEM at a decent price, I guess everyone's a winner here. I tend to use OEM filters (or Wix) even out of warranty. The exception is my G since the OEM filter isn't much more than a rebadged Fram, so I'm told.