I had a 500 sec. The engine is bulletproof. I stopped driving it regularly when it had about 140k on it mainly because of the long door and my 90 degree pull in parking lot.
I was trying to sell it. I autocrossed it for one season before selling it.
It was as cheap or cheaper than a diesel to maintain but did use a lot of fuel. For the 500 it was RUG. Mostly got mid teens and on a trip if not too speedy cold nearly get 20 mpg, but it was an awesome road car. I always felt very affluent driving it.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.

[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.