2-Cycle Fuel Mix Calculator & Gas Oil Ratio Chart

Gasoline Volume

Measurement Unit

Target Ratio

Custom Ratio (Gas parts to 1 part oil)

Required 2-Cycle Engine Oil

2.56 fl oz

75.7 mL (5.1 tablespoons)

2-Cycle Gas to Oil Ratio Chart (US Gallons)

Standard measurements for common fuel quantities using US gallons and fluid ounces (1 US Gallon = 128 fluid ounces):

Fuel Ratio	1 US Gallon	2 US Gallons	2.5 US Gallons	5 US Gallons
50:1	2.56 fl oz (75.7 mL)	5.12 fl oz (151.4 mL)	6.40 fl oz (189.3 mL)	12.80 fl oz (378.5 mL)
40:1	3.20 fl oz (94.6 mL)	6.40 fl oz (189.3 mL)	8.00 fl oz (236.6 mL)	16.00 fl oz (473.2 mL)
32:1	4.00 fl oz (118.3 mL)	8.00 fl oz (236.6 mL)	10.00 fl oz (295.7 mL)	20.00 fl oz (591.5 mL)
25:1	5.12 fl oz (151.4 mL)	10.24 fl oz (302.8 mL)	12.80 fl oz (378.5 mL)	25.60 fl oz (757.1 mL)
16:1	8.00 fl oz (236.6 mL)	16.00 fl oz (473.2 mL)	20.00 fl oz (591.5 mL)	40.00 fl oz (1,182.9 mL)

Metric 2-Stroke Fuel Mix Chart (Liters)

Standard measurements for metric volumes using Liters and Milliliters (1 Liter = 1,000 mL):

Fuel Ratio	1 Liter	5 Liters	10 Liters	20 Liters
50:1 (2%)	20 mL	100 mL	200 mL	400 mL
40:1 (2.5%)	25 mL	125 mL	250 mL	500 mL
32:1 (3.1%)	31.3 mL	156.3 mL	312.5 mL	625 mL
25:1 (4%)	40 mL	200 mL	400 mL	800 mL
16:1 (6.25%)	62.5 mL	312.5 mL	625 mL	1,250 mL

Essential Tips for Safe 2-Cycle Fuel Mixing

Always pour oil into the gas container before filling: Putting the 2-stroke oil into an approved gas can first ensures turbulent mixing when you pump or pour gasoline in. Always swirl or shake the container thoroughly before dispensing into your equipment.

Use a graduated mixing bottle for precision: Guessing measurements with capfuls leads to either plug fouling (too rich) or cylinder scoring (too lean). Pick up a calibrated 2-cycle oil ratio measuring bottle on Amazon to get exact fluid ounces every time.

Choose high-quality certified oil: Use oils meeting ISO-L-EGD or JASO FD specifications, such as synthetic or semi-synthetic 2-stroke engine oil on Amazon, for low smoke and clean exhaust ports.

Treat seasonal fuel with stabilizer: Gasoline containing ethanol starts degrading and separating within 30 days. Add a dedicated small engine fuel stabilizer on Amazon to fresh gas cans if fuel will sit in your garage or shed.

Never run straight gas in a 2-cycle engine: 2-stroke engines lack an oil sump or crankcase lubrication system. Running straight unmixed fuel will cause catastrophic piston seizure within minutes.

This page was created by an AI agent.