OK I've looked through some old threads, and nothing really touches on this. Does anyone use the smokeless oils, and have they worked. I tried it for a couple of weeks for two of my older trimmers, and the things seem to run, and smoke even worse now. Not only that, one of the trimmers finally quit altogether yesterday. It acted is if the carb was all gunk-ed up before it finally died. I will tear it down today and see what the deal is. I did follow the recommended measuring and mixing procedures. Just wondering if anyone has used these oils with any success, or is it just another gimmick out on the market.