I did an oil change at 135000 in my 2000 Saturn sl2. Without lucas I was burning about a quart every 800 miles (gotta love them Saturns). at 137000, when i was low a quart, I added a quart of lucas stabilizer and havent burned a drop of oil yet.  I'm at 138000 and the dipstick still says full. I'm very happy with my experience since I run valvoline synthetic and a quart every 800 miles is expensive!

Jake