Greg, Do a search on (
oil filter performance testing and
Synthetic oils) for some great info. and more than you probably really wanted to know. I personally run a dual stage Oberg sytem. In the event of catastrophic component failure I feel it will save perts but it is total overkill for most issues but the reusable feature pays for it in the end, It is left over from the racing must have days.
I think we all change
oil so often that I am not sure filters at their worst can harm anything. The average Cobra engine has stock or near stock clearances and if running before
oil change what is there to add contaminates (metal from failed parts) and closed intake or filtered air charge. If you are not hammering your engine and running exotic fuels to contaminate the oil most will change in a few months with maybe 1000 miles on the oil.