Many watercraft enthusiasts often wonder whether using a higher octane type of gasoline (e.g., supreme or premium unleaded) will result
in an increase in power and engine performance. The fact of the matter is that using supreme unleaded gasoline over regular unleaded may not always
yield the best performance results for your watercraft.
It is true that a higher octane gas can withstand more compression before detonating and that fuels with a higher octane rating
are typically used in high-compression engines that generally have higher performance; however, nowadays, most watercraft manufactures normally
set their engines, through carburetor jetting, to run on regular unleaded gasoline. If supreme unleaded gasoline is used instead, not only will you
be wasting money because regular unleaded gasoline is less expensive but the engine may actually run more sluggish and not rev up cleanly due to the
viscosity level of supreme unleaded fuel.
Keep in mind that this is not always true for all watercraft manufactures and some manufacturers recommend using supreme
unleaded fuel. It is best to verify the fuel requirements for your specific model of watercraft with the manufacturer and where possible, stick
with regular unleaded gasoline.