2-stroke engine fuel is a mixture of gasoline, lubricant (usually regular automotive engine oil), and a stabilizer if using a premix. The gasoline lubricates the piston rings and oil seals. The oil must fully evaporate if the engine operates properly. If your engine requires pre-mix lubrication, always use a stabilizer such as Star Tron to keep your gas fresh and prevent premature gum and varnish buildup.
Premix Fuel Ratio Guidelines:
A common gasoline-to-oil ratio for use is 32:1. This translates to 1 oz. of TC-W3 rated oil to 1 gallon of gasoline.
When measuring oil by ounce per gallon for larger quantities. Use a fluid ounce for two-stroke engines and one pint oil to five gallons of gasoline.
Mixing Premixed 2-Stroke Gasoline
Never use automotive oils in place of 2-stroke engine oil. Always mix gasoline with 2-cycle oil in a separate, marked container. Follow exact oil-to-fuel ratios outlined by your engine manufacturer, whether using a 32:1 or 50:1 premix.
Gasoline/Oil Premix Guidelines
- Make sure you select a top brand or synthetic TCW3-grade 2-stroke oil in your outboard engine.
- Avoid using old or unused outboard fuel/oil mix if it is more than 15 days old.
- Do not mix large quantities of gas/oil mix. Mix what is needed for a current job in a separate, marked container.
Note about mixing 2-Stroke Oil
Do not combine old mixed fuel with fresh fuel. Store pre-mixed fuel in tightly sealed containers in a cool, well-ventilated area. Check local laws for safe recycling methods of unmixed or leftover mixed fuel.
