Seeing as plane cleanliness is the major concern.
Why use any oil at all?
[link]http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=7070[/link]
For me it's Mobil 2T Fully synthetic (we can't get Stihl Ultra here), 40:1, Ford (for carrying my planes), Futaba S-Bus, 3W, MVVS and BME. - But my bike is also European as is my day to day drive.
