Originally Posted By: chevrofreak
I've used a couple Bosch filters on my moms car, and the efficiency rating (96.2% or something like that) was the same for both the Bosch and the blue PureONE's I now have for it. As far as I can tell, the only difference is that the PureONE gets different paint, and a teflon coated gasket.
The new yellow PureONEs are at 99.9% ... so I'm wondering if the Bosch is using the regular Purolator filtering media.