My Kohler command 15 was installed last spring. Only 1 1/2 years on it. My lifters clacked pertty loud and it bothered me. A few threads touched on this and there were 2 suggestions. #1 DO NOT OVERFILL OIL, KEEP IT AT THE BOTTOM OF THE GRID. #2 ADD SOME MARVEL MYSTERY OIL. I did both of these and the lifters are still clickin' but not quite so loud. Fine. But now, I am having to add a bit of oil, amybe 1-2 oz A DAY to keep the level safe. Did this advise cause damage to a $700.00 engine?