Final Notes
A serious word of caution to experimenters: if you are thinking of trying out different/oversized filters, or ones we haven't listed here, be careful! In the course of testing, we tried a Purolator PureOne oversized filter (PL10193); it leaked pretty bad. Upon inspection, the gasket was found to be MUCH too large, large enough that the oversized M1-105 filter (and M1-104, OEM size) gasket actually fit inside it. If you experiment, be very careful, and look over the filter before testing it. Check the filter immediately upon starting the motor and look for leaks. Be sure to keep a watchful eye on it, and monitor oil pressure if possible. Also keep in mind the difference in bypass spring pressures as this may dramatically affect the way your vehicle's oiling system operates. Check with the manufacturer for exact bypass spring specs, most will usually provide this information via simple email contact with you.

Check back, there are more filters on the way. For comments, questions, or to submit a different filter for analysis, please e-mail the author.