RE: DL50 what oil ratio?
For the record, the engine is a DL50 not a DA and for the reasons you describe is why I suggested that he ask his preffered support network. As you know, when it comes to oils and mix ratios, the opinions on any forum can be very confusing, varied,and misleading. Your experience, while very good information, could lead someone toignore the manufacturer and or the advise of their selling dealer which, if the engine is still under a manufacturers warranty, would be the worst thing one could do.