Home Ratios 16:1 Mix Ratio

16:1 Mix Ratio Calculator & Chart

Quick Answer A 16:1 mix ratio means 16 parts gasoline to 1 part 2-stroke oil. For 1 gallon of gas, you need 8 fl oz (236 mL) of oil. This ratio is very rich mixture for antique equipment and extreme duty cycles.

16:1 Mix Calculator

16:1

Fixed ratio for this calculator

Oil Needed

You Need
8
fl oz
for 1 gallon at 16:1 ratio
Milliliters
236
US Fluid Ounces
8
Liters
0.236

Need a different ratio? Use our full calculator →

What is a 16:1 Mix Ratio?

A 16:1 mix ratio means you mix 16 parts gasoline with 1 part 2-stroke oil. This creates a fuel mixture that is 5.88% oil and 94.12% gasoline by volume.

The 16:1 ratio is very rich mixture for antique equipment and extreme duty cycles.

The 16:1 ratio equals approximately 8 fl oz (236 mL) of oil per gallon of gasoline, or about 62.5 mL per liter.

Complete 16:1 Mixing Chart

Use this chart for quick reference when mixing fuel at 16:1 ratio:

US Gallons

Fuel (Gallons) Oil (fl oz) Oil (mL) Oil (Liters)
1 gallon 8.0 fl oz 236 mL 0.236 L
2 gallons 16.0 fl oz 472 mL 0.472 L
2.5 gallons 20.0 fl oz 590 mL 0.590 L
3 gallons 24.0 fl oz 708 mL 0.708 L
4 gallons 32.0 fl oz 944 mL 0.944 L
5 gallons 40.0 fl oz 1180 mL 1.180 L
6 gallons 48.0 fl oz 1416 mL 1.416 L
10 gallons 80.0 fl oz 2360 mL 2.360 L

Liters

Fuel (Liters) Oil (mL) Oil (fl oz)
1 liter 63 mL 2.11 fl oz
2 liters 125 mL 4.23 fl oz
5 liters 313 mL 10.57 fl oz
10 liters 625 mL 21.13 fl oz
20 liters 1250 mL 42.27 fl oz

Equipment That Uses 16:1 Ratio

The 16:1 ratio is very rich mixture for antique equipment and extreme duty cycles:

Antique Equipment

Very old equipment from the 1950s-1960s.

Extreme Duty

Engines under extreme stress or modified for racing.

Vintage Mopeds

Classic mopeds and scooters from the 1960s-1970s.

Antique Outboards

Outboard motors from the 1950s and earlier.

Always Use Your Equipment's Recommended Ratio

Using the wrong ratio can damage your engine. Check your owner's manual for the correct ratio.

Compare ratios →

16:1 Ratio FAQs

How much oil for 1 gallon at 16:1?
For 1 gallon of gasoline at 16:1 ratio, you need 8 fl oz (236 mL) of 2-stroke oil.
What equipment uses 16:1 ratio?
The 16:1 ratio is very rich mixture for antique equipment and extreme duty cycles.
Is 16:1 the same as 5.88%?
Yes, a 16:1 ratio equals 5.88% oil by volume. This means 5.88% of your total fuel mixture is 2-stroke oil and 94.12% is gasoline.
How do I mix 16:1 fuel?
To mix 16:1 fuel:
  1. Pour desired amount of gasoline into an approved fuel container
  2. Measure 8 fl oz of 2-stroke oil per gallon (use chart above)
  3. Add oil to gasoline (not the other way around)
  4. Cap the container and shake for 30 seconds to mix thoroughly
  5. Use within 30 days for best results
View detailed mixing guide →

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