The manual for the 2019 ATAS DCT shows first oil change at 600 miles. This includes replacing both engine oil filter and clutch oil filter. The manual shows next oil change at 8000 miles but oil change only, no replacement of either or both filters. The next oil change at 16000 miles shows replacing oil and both filters. Do the earlier Africa Twins follow this schedule? I was always taught to change filters at the same time as the oil is changed. Changing filters every other oil change is a strange concept for me. This is my first motorcycle with an 8000 mile oil change interval. The filters themselves don't appear to be overly expensive. Is everyone following the recommended schedule or are some replacing the filters with every oil change?