What kind of oil filter is the best for a [DSM]?

Some DSMs came equipped with a 'small' oil filter, and some with a 'big' oil filter - apparently a difference between Chrysler and Mitsubishi, as well as between different model years. Both filters appear to work the same, so owners generally don't sweat too much over which one to use.

A few owners with modified exhaust systems have found that the 'big' filter doesn't fit their car anymore. Changing to the small version seems to work fine for them as well.

As for brands, filters are like engine oils - it is nearly impossible to identify a 'best' oil filter. Many different oil filters seem to work equally well, and there is almost nothing to distinguish different brands from each other.

In a quest for knowledge, Russ Knize took a bunch of oil filters and cut them apart, to see how they compared internally. The results of his work have been written up on the Oil Filter Study page, which details the comparison of the different filter types. He also has a separate page detailing his personal recommendations on which oil filters should perform the best.

Final Word: Highly recommend to stick with Mitsubishi Filters