Home How Much Oil for 20 Liters at 40:1?

How Much Oil for 20 Liters at 40:1?

You Need:
16.9 fl oz
(500 mL or 0.500 liters)
of 2-stroke oil for 20 liters of gasoline at 40:1 ratio

How to Mix 20 Liters at 40:1

  1. Pour 20 liters of fresh gasoline into a clean, approved fuel container
  2. Measure 16.9 fl oz (500 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

40:1 Mixing Chart

Quick reference for other amounts at 40:1 ratio:

Liters Oil (fl oz) Oil (mL) Oil (Liters)
1 0.8 fl oz 25 mL 0.025 L
2 1.7 fl oz 50 mL 0.050 L
5 4.2 fl oz 125 mL 0.125 L
10 8.5 fl oz 250 mL 0.250 L
20 (current) 16.9 fl oz 500 mL 0.500 L

What Equipment Uses 40:1 Ratio?

The 40:1 ratio is common for older outboard motors, some string trimmers from the 1990s, and vintage chainsaws.

→ Complete 40:1 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:

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