Me too! I took a 4 oz. close as I could measure it, poured into the 2.6 oz. stihl bottle, right to the bottom of neck, shazam! I use Golden Spectro semi syn.Beat ya, I asked my Stihl dealer to save me a bunch of 2.6oz oil bottles so I could premeasure out my 4oz of k2. If you fill right below the neck on the Stihl bottles you gots yourself a 32:1 ready.