Thought I would share an observation......For some years, I have always run about a 5 ml dose of Lucas Injector Cleaner (the thick oily stuff)per gallon of gas that I use in my small equipment. These include an Echo blower, an Echo edger, a Snapper lawn mower, a hedge trimmer and a 28 year old snowblower with an 8 HP Tecumseh engine. I use mid-grade gasoline with ethanol and an appropriate 2 cycle oil as required for the blower and trimmer. ALl the engines have their original carbs and none have ever been rebuilt. I have seen some of these items go almost a year without starting (the edger particularly) and I never have any real trouble starting them. I am wondering if this is because the Lucas leaves a nice oily, non-polymerizable coating on all the carb parts? So far, in over 7-8 years, it seems to have worked quite well for me.