Purchase a chainsaw 576xp. I burned at the most 2 gallons of gas. I make sure the oil is mixed properly and the gas is clean and fresh. I had problems starting it after it was hot. It kept getting worse. Took it in for repairs and Husqvarna would not cover the repairs. They said the piston and cylinder is scored, must be from using old gas. This is a excuse not to cover the chainsaw as I know how careful I was about the gas and mixture. I will not buy another Husqvarna product.