Originally Posted By: wgtoys
Originally Posted By: SuperBusa
I think the STP filters are made by Fram, but no way the Purolators are made by Fram or even look like the Fram, as far as I've seen.
Just about every filter maker buys some of their part numbers from outside suppliers in order to fill out the lineup. The Jetta filter in question here is a cartridge type filter very unlike the typical spin-on filter. Oddly enough, the industry was once almost all cartridge type filters, but that switched over in the 1960s to the more convenient, yet also more wasteful, spin-on type. Most of the Euro cars have gone back to cartridges. It is quite possible that STP, Purolator and Fram could all be buying this part number from Mann and reselling it. Happens all the time.
Maybe true in the cartridge filter world, but I just looked at Mobil 1, K&N, Fram, STP, Bosch and Purolator all side-by-side at the local parts store the other day. These were spin-on filters. The Fram and STP were the same, the Purolator and Bosch were the same, and the Mobil 1 and K&N were the same. But in the spin-on world, the Fram and Purolator aren't even in the same zip code.