I have found the STP filters from AUTOZONE to work best for me. They are made by DEUTCH, but AZ changed the name on them as everybody kept calling them dusche filters. I ran WIX a few times and got the infamous DMAX typewriter tick REALLY bad, but I don't have it with the STP's. Also I have found that they all seem to have a drainback valve in them as well whereas some others won't have it.