Don't worry about it, it's normal. My mom's Generac did the same as does my portable with a Yamaha engine. I was checking both and adding every other day. Running the portable only during the day and the Generac only shut down when I shut it down to check it. Oddly my little Honda 1000i has never needed topped off.I just checked the oil in the 20kw Kohler. It’s been 94.9 hours of runtime so far. The oil dropped below the add mark. I added about 3 pints or .75 qts.
Kohler recommends checking the oil between every 8-24 hours.
Last I heard, power is estimated to be returned by 1700 on Sunday.