The Professional Series™ is a professional line of fully featured engines designed to deliver world-class endurance and power. With commercial-grade features the Professional Series delivers enhanced power, easy starting, smoother and quieter operation, long life, and professional results.
In canada only the Premium gas is made without ethanol. The other have 10% Ethanol. It is better to user 91 octane without ethanol or 87 with 10% ethanol ?