2-Cycle Oil Mix Calculator

Mixing oil and fuel for 2-cycle engines can be straightforward with the right guidance.

Using the correct oil-to-fuel ratio for your power equipment is important. This 2-cycle oil mix chart and an oil/fuel mix calculator can help.

Oil Mix Chart

Mix Ratio	Gas Volume	2-Cycle Oil
Imperial Fluid Ounces (US)
32 To 1	1 gal.	4 oz.
40 To 1	1 gal.	3.2 oz.
50 To 1	1 gal.	2.6 oz.
Metric Fluid Milliliters (Canada)
32 To 1	1 liter	31.25 ml
40 To 1	1 liter	25 ml
50 To 1	1 liter	20 ml

Oil Mix Calculator

What is a 2-Cycle Engine

A 2-cycle engine, also known as a two-stroke engine, completes a power cycle in two strokes of the piston (one up and one down).

2-Cycle Engines Need Mixed Fuel

Two-stroke engines require an oil-fuel mixture for lubrication, cooling, and sealing.

Common Mix Ratios

Common mix ratios for two-stroke engines include 50 to 1, 40 to 1, and 32 to 1.

Using Synthetic Oil

You can typically use synthetic oil when mixing 2-stroke fuel, but always check with the machine's manufacturer for specific instructions.

How to Mix 2 Cycle Oil

To mix 2-cycle oil:

1. Check Ratio: Confirm the manufacturer's recommended oil-to-fuel ratio for your specific 2-stroke engine.
2. Use Measuring Tools: Use a dedicated measuring cup or ratio-specific container to ensure precise measurements.
3. Pour Fuel First: Pour the required amount of gasoline into a clean, approved container.
4. Add Oil: Add the appropriate amount of 2-cycle oil to the container following the recommended ratio.
5. Secure Lid: Close the container tightly and shake it well to achieve a thorough and consistent mixture.
6. Fuel Up: Pour the mixed fuel into your 2-stroke engine's fuel tank and follow the manufacturer's instructions for starting and running.

Mixed Fuel Shelf Life

The shelf life of mixed fuel for 2-cycle engines depends on various factors, including the type of oil used, storage conditions, and the presence of stabilizers.

Fuel Mixing FAQs