I had 110K on mine when I bought it. It probly woulda lasted me forever, but the guy that owned it before me blew the valve cover gasket and didn't realize it. I slowly lost oil until the damn thing blew on me. I got a new one with 40K on it and have put 25K on it and have had absolutely no problems whatsoever with it. I am about to put a head package on it and possibly boost it if I don't sell the car in a year.