Saturn SL1 Smog

My Saturn Has Failed The Required Smog Test. I Had To Replace The Catalytic Converter And Have Replaced The Both O2 Sensors. I Have Failed...

I Failed The Smog Test Idling At 798rpm.... I Passed It At 2500 Rpm....i Changed My Oil Used Oil Additive And Fuel Additive...my Engine Was...

An The Oil Was Dirty It Did Not Fail By Much Only A Little. Will Dirty Oil Cause A Car Not To Pass The Smog Test. I Change The Spark./wires...