We were surprised there aren't as many self-serve laundromats in Oslo as one might expect in a city…read moreof its size. This is one of the few that was recommended by our hotel.
Here it's coin operated and there are English instructions, but if you come during office hours, the owner can help you out.
The place is a little messy, but there are plenty of machines and wifi to keep you occupied while you wait for your laundry to be done.