I have a 1998 SC2 with like 96k miles on it. I have replaced the O2 sensor, Catalytic converter, and muffler. The thing goes through a quart of oil every 750 - 1000 miles using 10W30. The auto parts store that ran the code said that they don't have a part available and that I have to go see a Saturn dealer. The check engine soon light comes on and off intermittently. How hard is it to mess with the EGR valve? Can it be cleaned up? Is this going to crap because of the oil consumption or possibly causing it? This car rumbles like a dog gone truck, could this be the cause? I know this may seem like a bunch of stupid cheap skate questions, but this thing has been a money pit at times! I just put more into my F150 than it is probably worth last month and things are a bit sore from that yet. Any comments would be greatly appreciated! TIA!