275,000 miles to me. I bought a 1991 Pontiac Grand Am 4dr LE with the 2.5 4cyl "iron duke" engine. Replaced timing chain and water pump, pulled valve cover gasket, everything looked ok. Put new valve cover gasket on it. When I bought it it had 105k on it. I drove that car for another 150k till it needed a heater core and thermostat! I sold it at 279,094.1 miles to a kid I still talk to and he still drives it. No problems other than a new exhaust and muffler and rear drum brakes. I did the rear drums and shoes as both wheel cylinders were leaking shortly after I bought it. I used valvoline 5w30 with a wix filter in it every 5,000 miles.
adam
adam