Looks like someone that changed their oil between 3-4K still wasn't good enough to stop the sludge prone 5sfe toyota camry engine.
http://groups.msn.com/ToyotaOwnersU..._Message=452&LastModified=4675419216833304158
http://groups.msn.com/ToyotaOwnersU..._Message=452&LastModified=4675419216833304158