Thank you all for all of your answers.
Thank you for the recommendations for use, but I never said I never used a chainsaw. Likewise regarding regular maintenance, I will do a good maintenance because I like to know how to leave with good bases, but there's still 2 days it turned nickel, simply thermal it works with a 2t mixture, and when I see the prices for ready-made mixtures. In the case of mine the mixture is recommended at 2.5%.
Macro
Personally for 6 years now .. I use in all my two-stroke materials synthetic bricomarket oil at 2% (motorcycle or field farming it's the same except the rix and the color of the can) Zero problem
As my current scooter oil is m ..., I will therefore follow the advice of Macro, in addition I have a DIY market near my home. Macro would you have a reference by chance, because motorcycle radius in my bricomarché there is no, just tiller, on the other hand the intermaché next to them they have a motorcycle radius, and as it is the same group, maybe I should look there.
Regarding electric chainsaws, I have one, but with the job I have to do, long live the thermal, especially das of cable. IF I also have to start buying a generator just for that, .... But I confirm for a small punctual job, the electric is practical.