We apologize for your loss. It's unfortunate the problem was caught too late. When you brought your vehicle in for the bad key, we called the extended service company to try and authorize the plugged banjo bolt at the PCV/Oil separator. They were very clear that any damage caused by lack of maintenance was not covered, and the plugged banjo was from just that. Volvo is incredibly sensitive to proper oil weight and timely service. It's probable the previous owner did not take good care of it. However, we have never performed an oil change nor did we inspect it when you bought it -- it was only the second time you had brought it in. Once we opened up that area, it was confirmed the engine had extreme sludge build-up and couldn't oil itself properly. That's why when you picked it up, we urged you to find it a new home and we gave you paperwork showing that Volvo's fix for this would be an engine rebuild. We also recommended taking it to a shop that did engine reverse flushes to save you a few thousand dollars. But by the time the light came on for your lean code, it was already too late. It's too bad whoever was doing your oil changes wasn't more thorough -- you may have been able to unload this lemon sooner.