2-Stroke Fuel Mix Calculator

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50:1
40:1
32:1
25:1
20:1
16:1
Custom Ratio: :1

Typical 2-stroke oil density: 0.85-0.95 g/mL

Results

Oil Needed
2.56
fl oz
for 1 gallon at 50:1 ratio
Milliliters
75.7
US Fluid Ounces
2.56
Liters
0.076

Mixing Instructions

Add 2.56 fl oz of oil to 1 gallon of gasoline. Mix thoroughly before use.

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About 2-Stroke Engine Mixing

Why Proper Mixing Matters

Using the correct fuel-to-oil ratio is critical for 2-stroke engine performance and longevity. Too little oil can cause engine damage from insufficient lubrication, while too much oil can lead to spark plug fouling and excessive smoke.

Common Ratio Guidelines

Modern 2-stroke engines typically use ratios between 40:1 and 50:1. Older engines may require richer mixtures like 25:1 or 32:1. Always consult your equipment manual for the manufacturer's recommended ratio.

Mixing Best Practices

Always mix fuel and oil in a separate container before adding to your equipment. Add oil to gasoline, not gasoline to oil. Shake or stir thoroughly to ensure proper emulsification. Use fresh fuel (less than 30 days old) for best results.