Home Ratios 32:1 Mix Ratio

32:1 Mix Ratio Calculator & Chart

Quick Answer A 32:1 mix ratio means 32 parts gasoline to 1 part 2-stroke oil. For 1 gallon of gas, you need 4 fl oz (118 mL) of oil. This ratio is popular for high-performance engines, some outboards, and older professional equipment.

32:1 Mix Calculator

32:1

Fixed ratio for this calculator

Oil Needed

You Need
4
fl oz
for 1 gallon at 32:1 ratio
Milliliters
118
US Fluid Ounces
4
Liters
0.118

Need a different ratio? Use our full calculator →

What is a 32:1 Mix Ratio?

A 32:1 mix ratio means you mix 32 parts gasoline with 1 part 2-stroke oil. This creates a fuel mixture that is 3.03% oil and 96.97% gasoline by volume.

The 32:1 ratio is popular for high-performance engines, some outboards, and older professional equipment.

The 32:1 ratio equals approximately 4 fl oz (118 mL) of oil per gallon of gasoline, or about 31.25 mL per liter.

Complete 32:1 Mixing Chart

Use this chart for quick reference when mixing fuel at 32:1 ratio:

US Gallons

Fuel (Gallons) Oil (fl oz) Oil (mL) Oil (Liters)
1 gallon 4.0 fl oz 118 mL 0.118 L
2 gallons 8.0 fl oz 236 mL 0.236 L
2.5 gallons 10.0 fl oz 295 mL 0.295 L
3 gallons 12.0 fl oz 354 mL 0.354 L
4 gallons 16.0 fl oz 472 mL 0.472 L
5 gallons 20.0 fl oz 590 mL 0.590 L
6 gallons 24.0 fl oz 708 mL 0.708 L
10 gallons 40.0 fl oz 1180 mL 1.180 L

Liters

Fuel (Liters) Oil (mL) Oil (fl oz)
1 liter 31 mL 1.06 fl oz
2 liters 63 mL 2.11 fl oz
5 liters 156 mL 5.28 fl oz
10 liters 313 mL 10.57 fl oz
20 liters 625 mL 21.13 fl oz

Equipment That Uses 32:1 Ratio

The 32:1 ratio is popular for high-performance engines, some outboards, and older professional equipment:

High-Performance Engines

Racing 2-stroke engines and modified equipment requiring extra lubrication.

Some Outboard Motors

Certain outboard motor models recommend 32:1 for break-in or normal operation.

Vintage Equipment

Professional equipment from the 1980s and 1990s.

Air-Cooled Engines

Engines that run hot and need additional lubrication.

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 →

32:1 Ratio FAQs

How much oil for 1 gallon at 32:1?
For 1 gallon of gasoline at 32:1 ratio, you need 4 fl oz (118 mL) of 2-stroke oil.
What equipment uses 32:1 ratio?
The 32:1 ratio is popular for high-performance engines, some outboards, and older professional equipment.
Is 32:1 the same as 3.03%?
Yes, a 32:1 ratio equals 3.03% oil by volume. This means 3.03% of your total fuel mixture is 2-stroke oil and 96.97% is gasoline.
How do I mix 32:1 fuel?
To mix 32:1 fuel:
  1. Pour desired amount of gasoline into an approved fuel container
  2. Measure 4 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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