Chebbies and Harleys do not leak
oil, that are just marking their spots!
The average ring will seat or be bedded in 1/2 hour or less of run time. BUT there are many ring types and even finish or grit honed will alter seating time. Verify proper fill level and readings. Multi Vescosity
oil will be consumed at higher rate than a straight weight and do not use
SYNTHETIC lubricants during break in period.
How old or new is engine? What
oil is being used? How much over what period or run time did level go down? Not being a wise gut but are you sure it was full at first reading and sure it is now down? Oil cooler T-stat could have opened and filled lines for first time as just 1 possible answer. Refill/check and drive again while checking very close would be my 2 cents worth of help. Give us more details second time and will try to help you guess what or why. Enjoy your Toy !