My manual says 2.0 L with filter, 1.6 without. However not all bottles are 1L. Even though I'm in Canada with the metric system. The oil I bought was 1 quart, which is 946 ml. So to get 2 L you would need 3 bottles. I just used 2 bottles for 1.9 L. My level is just below the full mark, maybe 2mm. I probably should add that last 100 ml now that i think of it.