Home How Much Oil for 4 Gallons at 20:1?

How Much Oil for 4 Gallons at 20:1?

You Need:
25.6 fl oz
(757 mL or 0.757 liters)
of 2-stroke oil for 4 gallons of gasoline at 20:1 ratio

How to Mix 4 Gallons at 20:1

  1. Pour 4 gallons of fresh gasoline into a clean, approved fuel container
  2. Measure 25.6 fl oz (757 mL) of high-quality 2-stroke oil
  3. Add the oil to the gasoline (not gasoline to oil)
  4. Cap the container and shake vigorously for 30 seconds to mix thoroughly
  5. Label the container with the mix ratio and date
  6. Use within 30 days for best performance

20:1 Mixing Chart

Quick reference for other amounts at 20:1 ratio:

Gallons Oil (fl oz) Oil (mL) Oil (Liters)
1 6.4 fl oz 189 mL 0.189 L
2 12.8 fl oz 379 mL 0.379 L
2.5 16.0 fl oz 473 mL 0.473 L
3 19.2 fl oz 568 mL 0.568 L
4 (current) 25.6 fl oz 757 mL 0.757 L
5 32.0 fl oz 946 mL 0.946 L
6 38.4 fl oz 1136 mL 1.136 L
10 64.0 fl oz 1893 mL 1.893 L

What Equipment Uses 20:1 Ratio?

The 20:1 ratio is a very rich mixture used for very old equipment from the 1960s-1970s, break-in periods for racing engines, and severe-duty applications.

→ Complete 20:1 Ratio Guide

Important

Always use the fuel ratio specified in your equipment's owner's manual. Using the wrong ratio can cause engine damage from inadequate lubrication (too lean) or fouled spark plugs and carbon buildup (too rich).

Need a Different Amount or Ratio?

Use our full calculator for custom amounts:

Go to Full Calculator

Related Questions