Annoying and time wasting. Instead of the 1 litre of oil shown in the photos, the oil came in two bottles, one big and one small, which had no indication on them of the capacity. I did some research and found these were American, so would be in ounces, not litres, but still no clue as to how much oil was in each. I ended up overfilling the engine slightly (very hard to tell with new oil in a new engine - especially with a smooth dipstick) causing it to smoke, and had to drain some off with the boat on the mooring.