I have and Echo trimmer and backpack blower that won’t die, just keeps running. I use Echo oil (black bottle-RedLine I think ?) I buy the small bottles that will mix with one gallon of gas but I add about a thimble full of extra oil to the mix from another open bottle. Always done that, so I really don’t know what my ratio actually becomes. But I get good longevity from my equipment. Oh and always used premium non ethanol gas. Heavy use should not be a cause your blower problem.