So long story short, something has catastrophically failed in the engine of my 2003 G35 and it’s consuming about 1 qt of oil every 150 miles. I’ve taken it to the Infiniti dealer as well as another shop and both have said to replace the engine, with quotes coming anywhere from $3800 for a used with 117k miles to a re-manufactured engine for about $7000 (price in both cases includes the install). The 117k mile engine has a 6 month/6k mile warranty and the re-man has a 100k mile warranty. I’ve inquired around about having someone do a rebuild on it and the shops that I’ve talked to that will actually do it are talking about $6000.
I’m hesitant to get a used engine because I don’t know what the last owner has done or hasn’t done to it, yet that’s the most economical fix. Am I being overly cautious or should I avoid a used engine? How much could I sell this car for as it is now? I’d imagine about $9000 less the cost of putting in a new engine, so about $5000 but I’m not sure (no one seems to advertise cars in this condition). It seems like putting a rebuilt engine is overkill (price-wise) for a car I was planning on selling in a couple of years anyways, but maybe not. Anyone have any advice or other suggestions? Thanks for your time!