# How much oil do I mix with gas for outboard motor?

## How much oil do I mix with gas for outboard motor?

Converting to the U.S. System How do you calculate the gas to oil mixture for a two-stroke boat motor in the United States? For a 50:1 ratio each gallon of gas requires 2.6 oz of two-stroke engine oil. For a 40:1 ratio each 1 gallon (gal) of gas requires 3.2 ounces (oz) of oil.

## What happens if you put too much oil in a 2-stroke outboard?

Using the proper oil-to-gas ratio is important, but if you’re off, it’s better to mix too much oil into your engine than mixing too little oil. Excess oil can produce a smoky exhaust, oil leaking out of the muffler, and sometimes loss of power.

How much oil do I mix with 3 gallons of gas?

Table of Ounces (US) of Oil to Add – Based on the above Formula

Gallons (US) 50:1 100:1
2 5.1 2.6
3 7.7 3.8
4 10.2 5.1
5 12.8 6.4

### Is 2 stroke and 2 cycle the same?

Two-cycle is short for two-stroke cycle. Thus there is no difference. They are different terms for the same type of engine which fires on every stroke, not every other stroke, which is what a 4-stroke does.

### How much oil do I mix with 5 gallons of gas?

For 5 gallons of gas, with a 50:1 ratio, the amount of oil required is 12.8 US ounces (100 ml). Experts agree that it is better to err toward the side of too much oil, rather than not enough. Typical break in period ratios are about twice the normal; 50:1 is generally 25:1 during break in.

HOW LONG CAN 2-stroke gas sit?

Don’t store any fuel – mixed or unmixed – for longer than 30 days. Old gasoline can hurt an engine’s power output, cause buildup and blockage in engine parts, and make starting more difficult. Storing gasoline with a fuel stabilizer can help extend the life of the gasoline.