New YH pump fired up this week with Filtertechs Seco 500. Prior to this I ran cheap oil under 200bar to flush gunk out. Moving forward how often do you recommend changing high quality oil?
Manual says after 50 hours for the first change and 100 hours or one year thereafter. Me, I change it when it looks dirty so an hour or so the first time and then I think it was ten or twelve hours the second and not at all after that as it is not looking dirty. But it's been near a year since the last change so it's about due for another one.