Ok, so my womans' car is a 2k Grand AM. It has 104k on the (2.4L 4 cylinder)engine, but 60k is exclusively from highway. Anyway, she gets off work yesterday and there is this horrendous knocking coming from the engine. I check the oil and it is completely out. So today I "change" the oil and to my suprise there is plenty of oil in it. I start the car up and it's still knocking like crazy. I rev it up a little and the knocking gets louder and it looks like oil is coming out of the muffler. So I'm thinking it needs a new engine. And thats my problem, I dont have a lot of extra loot laying around and my gf owes like 4k on the car still so she cant just scrap it. So to get to my point, (Sorry I just wanted to give as much info as possible in case there is someone out there familiar with these engines) should I just drop a lower mileage engine in the car, should I attempt to rebuild it or what?? I just pulled my first engine out of a CRX like 2 days ago (using pissedofsol's faq thank you very much!) and I have never attempted to put one into a car yet so I dont know if I could do that w/o messing stuff up. Any advice would be greatly appreciated, thanks a lot!!