I have 2 cycle (?) STIHL FS 110R, and it says to give 50:1 ration oil and gasoline. What is this??? I mean how do I mix it up? I used to just get an one bottle of tiny oil into 1 gallon of gasoline tank and mix with a gasoline shake it and good to go.... now what do I have to do differently? ( I also have STIHL FS85R, and Craftsman chain saw) that I use and use the same mix to operate them. STIHL 110R is new stock I just got from some one and now readilng the manual on it and found this 50:1 ration thing....... Oh, also is it true you can get WARNING yellow operation sticker that goes to the shaft on my Stihl weed trimmer fre at any Stihl dealer??