Husqvarna's best formulation to date is the " XP Professional Performance" 2-cycle lubricant. It is a synthetic blend designed for tough, professional usage. Not only does it have excellent lubricating properties but it also has low to medium smoke emission and includes a fuel stabilizer. This really is the perfect lubricant for all of your hard working engines. | Husqvarna XP Plus Professional Performance 2 Cycle Engine Oil 50:1