I know the BR600 has been a slightly finicky engine as far as the specific oil used in it. I want to use the Amsoil Saber, a 3.5 oz. bottle in a 2 gal. jug for about a 73:1 mix ratio. How does that sound, I figure it's close enough to 80:1 because I don't use up 5 gal. of 2 stroke that quick for a precise 80:1. I want to see just what you all thought as far as using this in this blower. I don't really want to throw $500 down the tube if this makes it have problems, but I personally don't think it will. I just like the benefits of using synthetics and having only 1 mix to deal with.