I recently purchased a new Stihl string trimmer and was told I should use their HP Ultra oil. The first time I started to fill the trimmer, I noticed a blue mix in the tank. HP Ultra is greenish. I called the dealer to ask the difference in the gas mixes and was given a lame answer of ” the oil companies use different dyes and even though it is the same oil, his was blue and mine green.”
That answer just sent me on a mission. Long story short, I found Opti-2 and it works great in my 32:1 saw, 40:1 (old) trimmer, and 50:1 (new) trimmer. The reason for the new trimmer, the old one was hard to start and keep running using the oil/gas mix prescribed for it. Funny how it always ran great post/repair shop until I added the prescribed mix.
Do yourself a favor and give Opti-2 a try before you give up on your equipment and purchase a replacement. You might just save a lot of money. BTW, my old trimmer runs great and starts on the first or second pull! Great product!
Thanks guys.