32:1 fuel mix: how much oil per gallon?
For a 32:1 mix, add 4 fl oz (118 ml) of 2-stroke oil to each US gallon of gas, or 31 ml per liter. That is 3.13 % oil.
A 2.6 fl oz bottle of oil goes with 83.2 fl oz (2.46 L) of gas at 32:1.
32:1 oil per US gallons of gas
32:1 oil per US gallons of gas| Gas | Oil | In spoons |
|---|
| 1 gal | 4 fl oz (118 ml) | 8 tbsp · 24 tsp |
|---|
| 2 gal | 8 fl oz (237 ml) | 16 tbsp · 48 tsp |
|---|
| 2.5 gal | 10 fl oz (296 ml) | 20 tbsp · 60 tsp |
|---|
| 3 gal | 12 fl oz (355 ml) | 24 tbsp · 72 tsp |
|---|
| 5 gal | 20 fl oz (591 ml) | 40 tbsp · 120 tsp |
|---|
32:1 oil per liters of gas
32:1 oil per liters of gas| Gas | Oil |
|---|
| 1 L | 31 ml (1.1 fl oz) |
|---|
| 4 L | 125 ml (4.2 fl oz) |
|---|
| 5 L | 156 ml (5.3 fl oz) |
|---|
| 10 L | 313 ml (10.6 fl oz) |
|---|
| 20 L | 625 ml (21.1 fl oz) |
|---|
Every common ratio, per gallon and per liter
Every common ratio, per gallon and per liter| Ratio | Oil per gallon | Oil per liter |
|---|
| 50:1 | 2.6 fl oz (76 ml) | 20 ml |
|---|
| 40:1 | 3.2 fl oz (95 ml) | 25 ml |
|---|
| 32:1 | 4 fl oz (118 ml) | 31 ml |
|---|
| 25:1 | 5.1 fl oz (151 ml) | 40 ml |
|---|
| 20:1 | 6.4 fl oz (189 ml) | 50 ml |
|---|
50:1 means 50 parts gas to 1 part oil: oil = gas ÷ 50, gas = oil × 50. 1 US gal = 128 fl oz = 3.785 L; 1 imperial gal = 4.546 L. Spoons are US: 1 tbsp = 1/2 fl oz, 1 tsp = 1/6 fl oz.
Estimates. Follow your engine manual’s ratio and the oil maker’s label. Mix outdoors in an approved fuel can, away from sparks and flames.
Frequently asked questions
How much oil per gallon at 32:1?
For a 32:1 mix, add 4 fl oz (118 ml) of 2-stroke oil to each US gallon of gas, or 31 ml per liter. That is 3.13 % oil.
How much oil for 5 gallons at 32:1?
20 fl oz (591 ml): 5 × 128 = 640 fl oz of gas, and 640 ÷ 32 = 20.
What percent oil is 32:1?
3.13 %: 1 part oil to 32 parts gas, and 1 ÷ 32 = 0.0313. Use the ratio your engine’s manual gives.