My wife's Saturn SL2 needs some help desperately. Its using about a quart every 2000 miles, no external leaks. It's already had a failure of the timing chain tensioner which was caused by poor oiling according to the dealer. My wife says she neglected the oil badly a few times early on. Now the car has 44,000 miles on it, the dealer says it needs a rebuild to fix the rings. I'm leaning towards trying some sort of aggressive cleaning oil in the hope that some rings are sticky and can be freed. By the way the valve cover/valvetrain are varnished deep brown indicating some harsh conditions. In the past I have used something called an engine flush before an oil change, that is an option too. Obviously if there is mechanical failure of the rings nothing is going to help but I think it is a bit extreme to drop thousands of bucks into engine work without trying some chemical cleaning first. Even if that does nothing, unless the oil consumption gets worse, it might be best to just monitor the oil and keep it full of something inexpensive, and forget about trying to stop the loss. So does anyone have a recommendation about what oil might do the job? Mobil Drive Clean? Delvac 1300?