A quart of MMO is a heavy dose. Don't run it over a thousand miles. If you have a lot of crud to clean up, put your hand on the oil filter every few days or so. If the oil filter is a bit cool, change it.
Take a bit of time and do a pint before each oil change, about 500 miles before. I can't say much about other products, there's too many to know them all. They probably all have their good points and their followers.