I've got a couple of thousand miles on my 84 Civic after a double Auto-RX treatment. The car has almost 383k miles on it now. Over about 20 years I've gone from 5w-30 up to 20w-50 to keep the oil consumption under control and even then if finally got to almost a quart every thousand miles. Now that the engine has been cleaned out, I'm back to 5w-30 and it appears that the consumption rate might be about a quart every 5k miles. I'll have a more accutate number when I do the next oil change. I'm really happy with the results. Under the valve cover it was pretty clean before the treatment, but that stuff must have really cleaned out the rings and valve seals. It took a little while, some driving and a few extra oil changes to get the job done, but it was worth it all. Thanks Frank.