1974 318 Chrysler.....70 hrs on this motor in the last few months and she hasn't used a drop of oil....but....I changed the oil after the boat sat for over 2 years prior to this.....she took about a half of a quart more than recommended. When I read the dipstick...one side of the stick shows a quart low.....the other side reads a quart high. What gives? Design flaw? I realize there isn't much normal about me, but the boat too!!!