Make sure the saw is tuned well first, if you bought it from a dealer with a shop did the dealer tune it before handing it over to you, sometimes these
saws come new with the carb not allowing enough fuel to the engine to meet
emission regulations. If you want to take a short video if it working and post
it here people will tell you how its running.
Use any fuel at all as long as it has no or low ether content, that kills carbs and engines.
Tru-Fuel at 40:1 sounds like a good mix.