I've spent a lot of time on this forum among others looking for info on the best filter to use for the Hyundai 2.4 Theta ii non-turbo engine. With posts going out of date as manufacturing has changed, and with a lack of information on many of the filters available for this engine, I finally bought my own filters to cut open and posted a video on it. I've been wondering what's inside these things for a while, and I'm glad I'm able to contribute this information to others who are looking for it:
- Super Tech ST9688
- Mobil 1 M-104A
- Fram XG9688
- Fram TG9688
Two of the most interesting things I found from doing this:
- Though the filters had differing heights, widths, pleat counts, end caps, and core diameters, the total filtering surface area of each filter remained pretty consistent (much more than I expected, though all a lot less than the oem 26300-35505).
- Finding that the Fram Ultra 9688 was missing the bypass valve spring and plastic plug. This style bypass valve is on so many filters these days, and I've never seen or heard of this happening. The filter was sealed with a sticker when I purchased it, so I'm pretty sure it wasn't tampered with. I'll likely contact Fram about this, since an unknowing person could've used this filter and had some unexpected issues!