I don't know why nobody shared a link instead of offering to email. Here is the download link to the owner's manual and a quick list showing what oils type you need for different passo models from 2004-2016.
You will need winzip, included are three pdfs.
Link: http://s000.tinyupload.com/index.php?file_id=32489282011439982615
It's a horrible translation of Japanese manual but gets the information across.
