A couple questions:

What's this "certified" that people keep talking about? Some say they paid to have it certified? What is the benefit of this?

Also folks keep mentioning an 8 year 80,000 mile warranty on theirs. What's that about? My dealer told me that mine only had 3/36 bumper to bumper and drive train (no 7/70 drivetrain because it is an SRT). Did they pull a fast one on me? How do I get the 8/80?

My SRT has a flashing wrench and -511 on the odometer when I start it. I thought it meant 500 miles until my next service, but the number is going up. What is it?

TIA,
Tom