"John Wentworth" wrote in message
...

There is no harm in using premium unleaded, but does your motor need
that octane rating?

There is a possible harm in using premium. The additional additives in the
premium can cause more deposits as compared to regular unleaded. You should
only use fuel with the octane rating recommended by the manufacturer, leaded
or not. Using fuel with an octane rating higher than required in a 2 stroke
will also reduce the horsepower of the motor.