What's your optimal 2-stroke fuel/oil pre-mix ratio? There are 7 factors for you to consider when determining your optimal 2-stroke fuel/oil ratio​ for your outboard.

Less Oil Needed

• Running more consistently at lower RPMs

• A water-cooled outboard with a good impeller, water pressure, and flow

• Running two-stroke oils with a higher viscosity

• You don't often run your boat at wide-open throttle

• You burn gas without ethanol, most pump gas in the USA is at 15%

• The air temperature is at a lower overall ambient level

• Your motor has advanced plating, like Nikasil, on the sleeves

More Oil Needed

• Running more consistently at or above the manufacturer RPM rating

• Your cowl does not provide any extra air cooling to your powerhead

• Running two-stroke oils with a lower viscosity

• You often run your boat at wide-open throttle and for longer runs

• You burn pump gas with 15% ethanol vs. recreational or race fuel

• The air temperature is at a higher overall ambient level

• Your motor has standard steel/iron bore sleeves

Use the chart above and score whether you are right or left of the dividing line.