Anyone who knows anything about cars can chip in here, just an update. After flirting with an extended warranty for used vehicles, we just decided to check the oil every 500 miles or so and add oil if necessary, and drive it until it blows up. I checked it once after 750 miles, and last night after 810...it is exactly on the "u" in full on the dipstick...so, no oil use in 1500+ miles since they put it back together. My wife said maybe they "fixed" something by putting it back together...something tighter or whatever? That sounds strange to me, but it makes as much sense as anything else that has happened. I know it was low once, as an oil change place told me the car had no oil on the dipstick after I went about 4500 miles between changes. They did 3 checks on it at Saturn...is it possible they forgot to fill it up each time, so when it used a tiny amount, it just added onto what was already used. A question for Teatoe or whoever, should I tell them to leave it a half-quart low when I add the oil additive? I assume you don't just want extra volume in there.