My daily driver (1996 Mercury Cougar) is starting to consume oil. The 4.6L V8 has 216,000 miles on it. Once in a while you'll see a puff of smoke from the exhausts on start up. There is a slight oil leak from the oil pan and possibly from the rear main seal area. The engine runs smooth as silk and does not knock.
I'm using 1½ to 2 quarts of oil every 3,000 miles lately. I do not want to put any money into the engine, so is there another way to help rejuvenate the engine with its leaks and oil usage? Is there some type of miracle stuff to pour into the crankcase? Can't blame me for asking.