I have 286K on my 93 240 wagon and see no reason why it couldn't go considerably longer before it expires. The problem I am having with the car developed recently and is exacerbated by the cold weather. The car starts just fine every morning, but as it is about half way to operating temperature (which occurs about a mile from my house if I drive it right away) the engine begins to stumble. I pull into a parking lot or side of the road as soon as the symptoms appear. The car will eventually die out unless I continually pump the accelerator pedal. After several minutes of keeping it running this way, It will reach a desired temperature and run great again. I'm stumped. Any Ideas???