Originally Posted By: dlundblad
Until the end of this month, Advance Auto Parts has Quaker State synthetic with a filter for $20.
That is by far the worst oil I have ever run in my car. Night and day difference. As soon as I drained that out and replaced it with SuperTech full synthetic, my engine was back to running smooth again. Heck, I'd even choose a conventional oil over Quaker State synthetic any day.