Purse swingers.******* I can't belive I've read through all this purse swinging. I've actually gleaned a few nuggets of info out of this so thanks to all which contributed to this thread. I still have a few liters of Motul 710 to burn through then 5 more bottles of Stihl Ultra that I got with my last trimmer. Then when I'm done I've got a case of Bailey's Woodlandpro to burn through so I'm good for several years.