Which oil filter would be best for a Saturn SL2 with 3000 mile oil changes-a Purolator Premium Plus or a Wix? The Purolator Premium Plus does not have a silicon valve and does not filter as well as the Purolator PureOne, but I feel that filter restricts oil flow too much. Or is the Wix a better choice? How do these filters perform in testing or in somebody's experience? And would a Purolator Premium Plus or a Wix be better for Auto-RX treatments? I am using chevron Supreme 5w30 oil, with 10w30 in the summertime.