I suspect that other short/wide filters would show similar results. This gives the WIX filters some of the lowest surface areas for this type of filter. The separate bypass valve assembly wastes enough space in the filter that the 1/4 inch loss of filter element width causes a 12% drop in overall surface area. Due to the short length of these filters, the WIX design seem present a problem. It has shallower pleats than some of the other filters due to the larger diameter of the core tube. This filter appears to be a Purolator, though the short cartridge doesn't seem to require an assembly string. It's constructed in the same way as the reference Baldwin filter. It has the second-largest surface areas out of the group partly due to its combination of a long cartridge and deep pleats. This filter is manufactured by Baldwin/Hastings. It is the same in every way with the STP filter below. This filter is manufactured by Champion Labs using their 'Ecore' design. However for filters in similar price ranges, it is reasonable to assume that the filter medias are somewhat comparable. This is a function of the media's composition as well as the surface area, which is not something I am equipped to compare. Note that even though the surface area is listed for comparison, the values don't correspond exactly to the filters' holding capacity.

If a filter has never been acquired, the vintage is marked as N/A. Since some brands often switch manufacturers without warning, check the reference filter page for any updates. Detailed sections of some of the models follow, though not all filters listed have them. Common brands and manufacturers link back to the reference filter page were more information can be found. The analysis is sorted by brand name in alphabetical order. German Filter - a common filter for German vehicles in order to get a look at some unique brands.Mopar Choices - filters of varying dimensions that are also compatible with the Chrysler 2.2L/2.5L engines.HP1 Filter - for racing applications of the above reference filter.Reference Filter - original, most complete reference for the common Chrysler/Ford filter.Project Overview - high-level view of this project.The domestic manufacturers are covered as well as the OEM Toyota filter. Mainly I was interested in the best filter for our vehicle (1999 V6 Camry). This page covers a common oil filter used on many current Toyota engines. Toyota Filters - Oil Filters Revealed - MiniMopar Resources

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