Importance of Dipstick Calibration

I was reminded while visiting a customer of an important maintenance practice. He commented that that one of his trucks with low miles uses a lot of oil. I asked if he had calibrated the dipstick as the operators manual suggests. He didn't know anything about it so I thought I would pass this along. If the mark on the dipstick is high, too much oil will be put in the engine at oil changes. The excess oil is picked up by the crank and thrown on the cyl walls and the rings will not be able to wipe it off sufficiently. This causes the oil to burn off and the level to go down which in turn causes the operator to add more oil to bring it back up to the mark. Then the process starts over again and a lot of oil is wasted. Also on later engines with PDF filters the ash from the oil will be causing a restriction in the exhaust and cause the fuel mileage to decrease.Any comments or questions, just post them and I'll get back to you. Thanks, gary