My down time with the Buick has been my fault. Something as simple as a header gasket leak (well really, there was nothing simple about it with my old headers) had me park the car for a month because I didn't feel like working on it. Nothing major has gone on it (knocks on wood) and when the motor finally pukes (it's bound to happen some time) I have an 85k mile motor waiting to go so that will just be a matter of me getting around to swapping it, which could take six months to a year depending on motivation........