I mentioned on another thread that I bought a couple of Tanaka trimmers. I'm going to post here how I feel about them as I use them this season. I will run only Tanaka oil in the machines, and service them according to the book. I will say, however, that I ran one unit a few days ago...was impressed with the power, but disappointed with the vibration. Last year I had what my doc called "white knuckle syndrome" from vibration on some of my equipment...I was hoping to eliminate the vib prob...maybe it's because it's new...time will tell. BTW...I purchased them because I was steered toward Tanaka by the mechanic at the dealer...he had no commission coming from the sale as I was already talking to another person on the "floor" about my trimmer needs. I'll post more about them as I use them during the season.