How To Mix 2-Stroke Fuel

Mixing 2-stroke fuel is a process which confuses many people, but is actually incredibly simple if done the right way. 

With so many machines powered by 2-stroke fuel, especially garden equipment, knowing how to correctly mix it is essential. 

Your first step should always be to refer to your user manual to find out what the required ratio of fuel and oil is for the machine in question. 

For many machines you will have a choice between 25:1 with mineral oil, or 40:1 with semi-synthetic oil. 

For the purpose of this article, we’ll use semi-synthetic oil.

Green liquid was used to easily highlight the bottle markings in this photo. 2-stroke fuel should not be green. 

So what does 40:1 mean? 

It’s simply 40 parts of fresh, unleaded fuel with 1 part of semi-synthetic 2 stroke oil. 

Although that might sound hard to measure, it’s actually an extremely simple process. 

Mixing should ALWAYS be done externally from the machine

You should NEVER try to mix a 2-stroke fuel in the fuel tank of a machine. 

The best tool for the job is a fuel measuring bottle, which is sometimes supplied free with your machine. 

The marks on a measuring bottle will make it simple for you to see which lines you need to pour both fluids up to.

Simply find the ratio which is correct for your machine, which in this case is 40:1, and pour the petrol up to the first marker, and the oil up to the second. 

It’s that simple! 

Your mixture is now ready and safe to pour in to the fuel tank of your machine. 

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